Generate antonyms

I. Lvg Command:

shell> lvg -f:z -F:1:2

II. Test Cases:

ability|inability
ability|unability
abiogenesis|biogenesis
abiotic|biotic
ablastemic|blastemic
able|unable
abnormal|normal
abnormal|normal
abominate|love
above|below
above|below
above|beneath
above|beneath
abridge|expand
absence|presence
absent|present
absorbable|inabsorbable
absorbable|nonabsorbable
absorbable|unabsorbable
abundance|lack
abundance|nonabundance
abundance|scarceness
abundance|scarcity
abundant|nonabundant
abundant|scarce
academic|nonacademic
academic|unacademic
acaudal|caudal
acaudal|caudate
acaudate|caudate
acaudate|caudated
accept|reject
acceptable|inacceptable
acceptable|nonacceptable
acceptable|unacceptable
accessable|inaccessable
accessible|inaccessible
accessible|nonaccessible
accessible|unaccessible
accidental|intentional
accidental|nonaccidental
accurate|inaccurate
acellular|cellular
acenesthesia|cenesthesia
acentric|centric
achalasia|chalasia
acholuric|choluric
achordal|chordal
achordate|chordate
achromatic|chromatic
achromatophil|chromatophil
achromophilous|chromophilous
acid|antiacid
acid|antiacid
acid|nonacid
acute|chronic
acute|nonacute
acyanotic|cyanotic
acyclic|cyclic
adactylous|dactylous
adaptable|inadaptable
adaptable|nonadaptable
adaptable|unadaptable
add|deduct
add|remove
add|subtract
avascular|vascular
avirulent|virulent
avoidable|inevitable
avoidable|unavoidable
avow|disavow
awake|asleep
aware|incognizant
aware|unaware
awesome|unimpressive
awned|awnless
awnless|awned
awnless|awny
background|foreground
background|high-light
background|highlight
background|spotlight
backward|ahead
backward|forrad
backward|forrard
backward|forward
backward|forward
backward|forwards
backward|frontward
backward|frontwards
backward|onward
bacterial|antibacterial
bacterial|nonbacterial
bad|good
bad|good
bad|good
bad|well
balance|asymmetry
balance|imbalance
balance|instability
balance|unbalance
bar|unbar
barbed|barbless
barbed|unbarbed
barbless|barbed
barren|fertile
bumpy|bumpless
bumpy|smooth
burden|disburden
burden|unburden
buy|sell
buyer|seller
bye|hi
cachectic|anticachectic
calculable|incalculable
calculous|acalculous
calculous|anticalculous
calm|agitate
calm|commove
calm|discomposure
calm|excite
calm|excited
calm|panic
calm|stimulate
calm|stormy
calm|troubled
can|can't
can|cannot
cancer|noncancer
cancerous|noncancerous
cannot|can
canonical|noncanonical
canonical|uncanonical
can't|can
capable|incapable
captivity|freedom
carcinogenic|anticarcinogenic
careful|careless
careless|careful
careless|cautious
cariogenic|anticariogenic
cariogenic|noncariogenic
carious|anticarious
caudal|acaudal
caudal|cephalic
caudate|acaudal
caudate|acaudate
cautious|careless
cautious|incautious
chalasia|achalasia
changeful|changeless
changeless|changeful
characteristic|noncharacteristic
characteristic|uncharacteristic
charged|noncharged
charged|uncharged
cheerful|cheerless
cheerful|depressing
cheerful|dreary
cheerful|gloomy
cheerful|sad
cheerful|uncheerful
cheerless|cheerful
cheerless|cheery
cheery|cheerless
chemical|nonchemical
child|adult
could|couldn't
couldn't|could
countable|uncountable
counterclockwise|clockwise
counterclockwise|clockwise
counterreform|reform
couple|uncouple
coupler|uncoupler
courage|cowardice
courage|cowardliness
courageous|cowardly
courteous|discourteous
courtesy|discourtesy
courtesy|rudeness
cowardice|braveness
cowardice|bravery
cowardice|courage
cowardice|courageousness
cowardly|brave
cowardly|courageous
cranial|acranial
create|destroy
credulity|incredulity
credulous|incredulous
crested|crestless
crestless|crested
critical|acritical
critical|noncritical
critical|noncrucial
critical|uncritical
criticism|praise
cruel|kind
cruel|merciful
cruelty|kindness
cry|laugh
culprit|innocent
cultivated|uncultivated
culturable|nonculturable
culturable|unculturable
cultured|noncultured
cultured|uncultured
curable|incurable
curse|bless
curtail|extend
customer|shopkeeper
customer|supplier
cyanotic|acyanotic
cyclic|acyclic
cyclic|non-cyclic
cyclic|non-cyclical
cyclic|noncyclic
cyclic|noncyclical
cytopathogenic|noncytopathogenic
dactylous|adactylous
dainty|clumsy
damage|improve
danger|safety
dare|daren't
daren't|dare
dark|light
dark|light-colored
dark|light-coloured
dark|lightcolored
dark|lightcoloured
dark|lighting
dated|undated
dawdle|hasten
dawdle|rush
dawn|dusk
defluoridate|fluoridate
degradable|nondegradable
dehalogenate|halogenate
dehemoglobinize|hemoglobinize
dehepatised|hepatised
dehepatized|hepatized
dehiscent|indehiscent
dehumanise|humanise
dehumanise|humanize
dehumanize|humanise
dehumanize|humanize
dehumidify|humidify
dehumidify|moisturise
dehumidify|moisturize
dehydrate|hydrate
dehydrogenate|hydrogenate
dehydrogenize|hydrogenize
dehypnotise|hypnotise
dehypnotize|hypnotize
deinduce|induce
deinstitutionalise|institutionalise
deinstitutionalize|institutionalize
deionise|ionise
deionize|ionize
deleterious|helpful
deleterious|nondeleterious
delusional|nondelusional
demagnetise|magnetise
demagnetise|magnetize
demagnetize|magnetise
demagnetize|magnetize
demetalise|metalise
dimensionless|dimensioned
dingy|shiny
dinic|antidinic
dipsetic|antidipsetic
direct|indirect
direct|nondirect
directed|nondirected
directed|undirected
dirtiness|cleanness
dirty|clean
dirty|clean
disacidify|acidify
disadvantage|advantage
disadvantage|advantage
disadvantageous|advantageous
disagree|agree
disagree|concord
disagree|concur
disagree|gibe
disagree|gybe
disagree|jibe
disagree|jibe
disagreeable|agreeable
disallow|allow
disallow|countenance
disallow|permit
disappear|emerge
do|don't
do|undo
does|doesn't
doesn't|does
dominant|nondominant
dominant|recessive
done|undone
don't|do
dopaminergic|antidopaminergic
doubt|certainty
doubt|trust
down|up
down|up
down|up
down|upward
downstairs|upstair
downstairs|upstairs
downstairs|upstairs
downwards|up
downwards|upward
downwards|upwardly
downwards|upwards
drama|comedy
dreamful|dreamless
dreamless|dreamful
dreary|cheerful
dress|disrobe
dress|strip
dress|unclothe
dress|undress
drunk|sober
dubious|certain
durable|fragile
dusk|dawn
dutiful|disobedient
dwarf|giant
dwarf|giant
dynamic|adynamic
dynamic|static
dynamic|stative
dynamic|undynamic
dysdiadochocinetic|diadochocinetic
dysdiadochokinetic|diadochokinetic
dysenteric|antidysenteric
dysenteric|nondysenteric
dysequilibrium|equilibrium
dyssocial|social
eager|reluctant
eager|uneager
eared|earless
earless|eared
early|late
early|tardily
east|West
east|West
east|west
east|west
east|west
east|west
ebb|flow
ebb|surge
echoic|anechoic
echoic|nonechoic
economic|uneconomic
economical|uneconomical
eczematic|antieczematic
eczematous|antieczematous
eczematous|noneczematous
edematous|antiedematous
edemic|antiedemic
edible|inedible
edible|uneatable
educated|ignorant
educated|uneducated
effectful|effectless
effective|ineffective
effective|ineffectual
effective|noneffective
effectless|effectful
effectual|ineffective
effectual|ineffectual
efficient|inefficient
effortful|effortless
effortless|effortful
either|neither
either|neither
ejection|nonejection
elastic|inelastic
elastic|nonelastic
elastic|unelastic
elderly|nonelderly
elderly|young
elderly|young
elective|nonelective
electric|nonelectric
equivalence|nonequivalence
equivocal|Y
equivocal|unambiguous
equivocal|unequivocal
eradicable|ineradicable
erosive|nonerosive
escalate|de-escalate
escalate|deescalate
escapable|inescapable
essential|inessential
essential|inessential
essential|non-essential
essential|nonessential
essential|nonessential
essential|unessential
etiological|anetiological
euploid|aneuploid
expired|unexpired
explicable|incomprehensible
explicable|inexplicable
explode|implode
exposure|nonexposure
expressive|expressionless
expressive|inexpressive
expressive|nonexpressive
extend|curtail
exterior|inside
exterior|interior
exterior|interior
external|internal
external|internal
extinguish|ignite
extraordinary|ordinary
extraordinary|ordinary
extra-ordinary|ordinary
extra-ordinary|ordinary
extricable|inextricable
fact|fiction
fade|brighten
failure|success
faithful|faithless
faithful|unfaithful
faithless|faithful
fake|genuine
fake|real
fall|ascend
fall|ascension
fall|ascent
fall|rise
fall|rise
fall|rising
fallible|infallible
false|true
falsehood|truth
familiar|nonfamiliar
familiar|unfamiliar
famous|nonfamous
famous|unknown
fancy|plain
far|near
far|near
far|nigh
fat|lean
fat|leanness
fat|non-fat
fat|nonfat
fat|skinny
fat|slim
fat|slim
fatal|nonfatal
fatless|fatty
fatty|fat-free
fatty|fatless
fatty|non-fat
fatty|nonfat
fatty|nonfatty
faultless|faulty
furl|unfurl
fusional|fusionless
fusionless|fusional
future|past
future|past
gamic|agamic
gamogenetic|agamogenetic
ganglionic|aganglionic
gastric|agastric
gated|nongated
gated|ungated
gendered|genderless
genderless|gendered
general|local
general|particular
general|special
general|specific
gentle|ungentle
gentle|violent
genuine|counterfeit
genuine|fake
geotropic|ageotropic
giant|dwarf
giant|dwarf
giant|pigmy
giant|pygmy
giant|small
giant|tiny
girl|boy
grow|shrink
guest|host
guileful|guileless
guileless|guileful
guiltless|guilty
guilty|clean-handed
guilty|guiltless
guilty|innocent
had|hadn't
hadn't|had
haemoglobinless|haemoglobinous
haemoglobinless|hemoglobinous
haemoglobinous|haemoglobinless
haemoglobinous|hemoglobinless
haemorrhagic|antihaemorrhagic
haired|hairless
hairless|haired
hairless|hairy
hairless|hirsute
hairy|hairless
hairy|nonhairy
hallucinatory|antihallucinatory
halogenate|dehalogenate
handicapped|nonhandicapped
handsome|ugly
happiness|sadness
happiness|unhappiness
happy|sad
happy|unhappy
harmful|harmless
harmless|harmful
harmonious|disharmonious
harmonious|inharmonious
harmonious|unharmonious
harmony|discord
harmony|disharmony
harmony|dissonance
harsh|mild
has|hasn't
hasn't|has
hasten|dawdle
hasten|linger
hate|adore
hate|enjoy
hate|like
hate|love
have|abstain
have|haven't
have|lack
have-not|haves
haven't|have
haves|have-not
hazardless|hazardous
hazardous|hazardless
hazardous|nonhazardous
HBc|antiHBc
headed|headless
headed|unheaded
headless|headed
hyperglycaemic|antihyperglycaemic
hyperglycemic|antihyperglycemic
hyperlipoproteinemic|antihyperlipoproteinemic
hyperlipoproteinemic|antihyperlipoproteinemic
hypertensive|antihypertensive
hypertensive|hypotensive
hypertensive|hypotensive
hypertensive|nonhypertensive
hypertensive|normotensive
hypertrophic|nonhypertrophic
hypnotise|dehypnotise
hypnotize|dehypnotize
hypotensive|antihypotensive
hypotensive|hyper-tensive
hypotensive|hypertensive
hypotensive|nonhypotensive
hypoxic|antihypoxic
hysteric|antihysteric
icteric|anicteric
icteric|nonicteric
identical|different
identical|nonidentical
idiomatic|unidiomatic
ignite|extinguish
ignite|quench
ignorance|knowledge
ignorant|educated
ignore|notice
ill|good
ill|well
illegal|lawful
illegal|legal
illegible|legible
illegitimate|legitimate
illicit|licit
illiterate|literate
illogical|logical
imbalance|balance
imbalance|symmetry
imitable|inimitable
immaculate|maculate
improve|damage
improve|worsen
imprudent|prudent
impure|pure
in|out
in|out
inaccessable|accessable
inaccessible|accessible
inaccurate|accurate
inactive|active
inactive|operational
inactive|operational
inadequate|adequate
inadmissable|admissable
inadmissible|admissible
inagglutinable|agglutinable
inalienable|alienable
inalimental|alimental
inalterable|alterable
inapplicable|applicable
inappropriate|appropriate
irrepressible|repressible
irreproducible|reproducible
irresectable|resectable
irresistable|resistable
irresistible|resistible
irresolute|resolute
irresolvable|resolvable
irrespirable|respirable
irresponsible|responsible
irretrievable|retrievable
irreverent|reverent
irreversible|reversible
irrevocable|revocable
irritable|unirritable
is|isn't
ischaemic|nonischaemic
ischemic|nonischemic
isn't|is
isochromatic|anisochromatic
isodiametric|anisodiametric
isogametic|anisogametic
isolation|community
isomeric|anisomeric
isometropia|anisometropia
isometropic|anisometropic
isoosmotic|anisoosmotic
isosmotic|anisosmotic
isosporous|anisosporous
isotonic|anisotonic
isotropy|anisotropy
join|disjoint
join|separate
jointed|jointless
jointless|jointed
jolly|unhappy
joy|anguish
joy|grief
joy|sadness
joy|sorrow
joy|sorrow
joyful|joyless
joyless|joyful
joyless|joyous
joyous|joyless
judgmentally|nonjudgmentally
judicious|injudicious
junior|senior
junior|senior
just|inequitable
just|unjust
justice|injustice
justifiable|unjustifiable
ketogenetic|antiketogenetic
ketoplastic|antiketoplastic
kinaesthesia|akinaesthesia
kind|cruel
kindness|cruelty
kinesthesia|akinesthesia
knobbed|knobless
knobless|knobbed
knowledge|ignorance
known|unknown
known|unknown
lack|abundance
lack|have
lack|plenty
ladylike|unladylike
land|water
landlord|tenant
languid|alert
languid|lively
large|little
large|small
large|small
last|first
last|first
late|early
laugh|cry
lavish|frugal
lawful|illegal
lawful|unlawful
lazy|diligent
lazy|energetic
lazy|energetick
lazy|industrious
leader|follower
learn|teach
learn|unlearn
leash|unleash
least|most
lecithal|alecithal
lecturer|student
legal|illegal
legible|illegible
legitimate|delegitimate
legitimate|illegitimate
leishmanial|antileishmanial
leisurely|urgent
lender|borrower
length|width
lengthen|shorten
lenient|strict
leprotic|antileprotic
leprotic|antileprotic
lesioned|nonlesioned
lesioned|unlesioned
less|more
less|more
less|more
less|much
lethal|nonlethal
lethargic|antilethargic
lethargic|energetic
lethargic|energetick
leucocytic|antileucocytic
leukocytic|aleukocytic
leukocytic|antileukocytic
lexical|nonlexical
licit|illicit
life|death
light|dark
light|darkness
like|dislike
like|dissimilar
like|hate
like|unlike
like|unlike
likely|improbable
likely|unlikely
limbed|limbless
limbless|limbed
limited|boundless
limited|limitless
limited|unlimited
limitless|limited
linear|nonlinear
lipaemic|antilipaemic
lipemic|antilipemic
lipid|nonlipid
lipogenic|alipogenic
lipotropic|alipotropic
lipotropic|antilipotropic
literal|figurative
literate|illiterate
lithic|antilithic
little|big
little|large
little|much
little|much
live|die
lively|dull
lively|languid
load|unload
lobed|lobeless
lobeless|lobed
local|distant
local|general
local|global
local|nonlocal
lock|unlock
lodge|dislodge
lofty|lowly
logical|illogical
loose|compact
loose|tight
loser|winner
lossless|lossy
lossless|lossy
lossy|loss-less
lossy|lossless
loud|quiet
loud|softly
love|abominate
love|detest
love|hate
love|hatred
lovely|terrible
loving|unloving
low|high
low|high
low|high
low|upper
lower|elevate
lower|elevate
lower|lift
lower|raise
lowly|lofty
lowly|sublime
loyal|disloyal
luckless|lucky
lucky|luckless
luetic|antiluetic
lymphoblastic|nonlymphoblastic
lymphocytic|antilymphocytic
lymphocytic|nonlymphocytic
lytic|antilytic
maculate|immaculate
magnetic|antimagnetic
magnetic|nonmagnetic
magnetise|degauss
magnetise|demagnetise
magnetise|demagnetize
magnetize|degauss
magnetize|demagnetise
magnetize|demagnetize
mainstream|nonmainstream
major|minor
major|nonmajor
majority|minority
malarial|antimalarial
male|female
male|female
maleficence|beneficence
maleficence|nonmaleficence
maleficent|beneficent
maleficent|nonmaleficent
manageable|intractable
manageable|intractible
manageable|unmanageable
managed|unmanaged
maniacal|antimaniacal
manual|automated
manual|nonmanual
many|few
many|few
marriage|divorce
married|divorced
married|divorced
married|unmarried
marry|divorce
marvellous|terrible
marvelous|terrible
mask|unmask
massless|massy
massy|massless
match|mismatch
material|immaterial
material|incorporeal
mature|immature
mature|young
maximum|minimum
maximum|minimum
may|mayn't
mayn't|may
meaningful|meaningless
meaningless|meaningful
measurable|immeasurable
measurable|immensurable
measurable|unmeasurable
measured|unmeasured
mechanical|nonmechanical
medicable|immedicable
medical|nonmedical
medicinal|nonmedicinal
medullated|nonmedullated
medullated|unmedullated
membered|memberless
memberless|membered
membraned|membraneless
membraneless|membraned
menorrheal|amenorrheal
mephitic|antimephitic
merciful|cruel
meretricious|unembellished
merry|mirthless
merry|sad
mesenteric|antimesenteric
messy|neat
messy|tidy
metal|nonmetal
metalise|demetalise
metalize|demetalize
metallize|demetallize
methemoglobinemic|antimethemoglobinemic
methemoglobinemic|antimethemoglobinemic
miasmatic|antimiasmatic
microbial|antimicrobial
microbial|nonmicrobial
microbic|amicrobic
microbic|antimicrobic
microfilaraemic|amicrofilaraemic
microfilaremic|amicrofilaremic
midday|midnight
midday|midnight
mid-day|midnight
mid-day|midnight
midnight|mid-day
midnight|midday
might|mightn't
mightn't|might
mild|harsh
mild|intense
mild|severe
mild|strong
militarise|demilitarise
militarise|demilitarize
militarize|demilitarise
militarize|demilitarize
mindful|unmindful
mineralise|demineralise
mineralize|demineralize
minimum|maximal
minimum|maximum
minimum|maximum
minor|major
minor|severe
minority|majority
mirthful|mirthless
mirthless|merry
mirthless|mirthful
miscible|immiscible
miser|spendthrift
mismatch|match
misquotation|quotation
misquote|quote
mistrust|trust
mitotic|antimitotic
mitotic|antimitotic
mix|separate
mobile|immobile
mobilise|demob
mobilise|demobilise
mobilise|demobilize
mobilise|inactivate
mobilize|demob
mobilize|demobilise
mobilize|demobilize
mobilize|inactivate
moderate|immoderate
modern|ancient
modest|immodest
modifiable|nonmodifiable
modifiable|unmodifiable
monarchy|republic
monetary|nonmonetary
monetise|demonetise
monetize|demonetize
moneyed|moneyless
moneyless|moneyed
monocyte|antimonocyte
monotonicity|nonmonotonicity
moral|amoral
moral|immoral
more|less
more|less
more|less
morning|evening
most|least
motile|immotile
motile|nonmotile
motor|nonmotor
mount|dismount
mountain|valley
movable|immovable
movable|unmovable
much|less
much|little
much|little
much|no
muscarinic|antimuscarinic
muscular|nonmuscular
musical|unmusical
must|mustn't
mustn't|must
mutable|immutable
myasthenic|antimyasthenic
myasthenic|antimyasthenic
mycobacterial|antimycobacterial
mycotic|antimycotic
myelic|amyelic
myelinated|nonmyelinated
myelinated|unmyelinated
myelinic|amyelinic
myeloablated|nonmyeloablated
myeloablative|nonmyeloablative
myelonic|amyelonic
nadir|zenith
naive|sophisticated
naïve|sophisticated
narcotic|antinarcotic
narrow|broad
narrow|wide
narrow|widen
nasality|denasality
nasty|nice
nasty|pleasant
nationalise|denationalise
nationalise|denationalize
nationalize|denationalise
nationalize|denationalize
native|foreign
native|foreigner
native|nonnative
natural|nonnatural
natural|unnatural
naught|something
nauseant|antinauseant
nauseant|antinauseant
near|distance
near|far
near|far
neat|messy
necessary|nonnecessary
necessary|unnecessary
need|needn't
needful|needless
needless|needful
needn't|need
negligible|nonnegligible
neither|either
neither|either
neoplastic|antineoplastic
neoplastic|nonneoplastic
nephew|niece
nephric|anephric
nephritic|antinephritic
nerve|unnerve
neuralgic|antineuralgic
neuritic|antineuritic
neurogenic|aneurogenic
neuronal|nonneuronal
never|always
never|e'er
never|ever
new|ancient
nice|nasty
nice|unpleasant
niece|nephew
nighttime|day
nighttime|day
nighttime|day-time
nighttime|day-time
nighttime|daytime
nighttime|daytime
night-time|day
night-time|day
night-time|day-time
night-time|day-time
night-time|daytime
night-time|daytime
nitrogenous|anitrogenous
nitrogenous|nonnitrogenous
no|much
no|some
no|yes
nobody|everybody
nobody|some-body
nobody|somebody
nociceptive|antinociceptive
nocuous|innocuous
noise|silence
noisy|noiseless
noisy|quiet
noisy|silent
nonabsorbable|absorbable
nonacademic|academic
nonaccidental|accidental
nonacid|acid
nonaction|action
nonacute|acute
nonadherence|adherence
nonadherent|adherent
nonadhesive|adhesive
nonadhesiveness|adhesiveness
nonadjacent|adjacent
nonadministration|administration
nonadrenergic|adrenergic
nonadrenergic|adrenergic
nonaggression|aggression
nonaggressive|aggressive
nonalcoholic|alcoholic
nonalcoholic|alcoholic
nonalignment|alignment
nonalignment|alignment
nonalignment|alinement
nonalignment|alinement
nonallopathic|allopathic
nonantibiotic|antibiotic
nonantibiotic|antibiotic
nonantigenic|antigenic
nonargumentative|argumentative
nonaromatic|aromatic
nonaromatic|aromatic
nonarteriosclerotic|arteriosclerotic
nonarticular|articular
nonwoody|woody
noone|someone
noone|someone
noöne|someone
nor|or
normal|abnormal
normal|abnormal
normal|anomalous
normal|diseased
normal|impaired
normal|pathologic
normal|strange
north|South
north|South
north|south
north|south
north|south
north|south
north|south
north|south
North|South
North|South
North|south
North|south
North|south
North|south
North|south
North|south
nothing|everything
nothing|something
notice|ignore
nought|something
now|then
noxious|innoxious
nuclear|antinuclear
nuclear|nonnuclear
nucleated|anucleated
nucleated|nonnucleated
nucleated|unnucleated
nutritional|nonnutritional
obedience|disobedience
obedience|non-compliance
obedience|noncompliance
obedient|disobedient
obey|disobey
objectionable|unobjectionable
obligatory|nonobligatory
obliterative|nonobliterative
observance|nonobservance
obstetric|nonobstetric
obstetrical|nonobstetrical
obstructive|nonobstructive
obtainable|unobtainable
obvious|nonobvious
obvious|recondite
occlusion|nonocclusion
occlusive|nonocclusive
occupational|nonoccupational
odontalgic|antiodontalgic
odorless|odorous
odorless|odourous
odorous|inodorous
odorous|nonodorous
odorous|odorless
odorous|odourless
odourless|odorous
odourless|odourous
odourous|inodorous
odourous|odorless
odourous|odourless
oedematous|antioedematous
off|on
off|on
off|on
offensive|defensive
offensive|inoffensive
offer|beg
official|unofficial
often|infrequently
often|seldom
often|seldomly
older|younger
oliguric|nonoliguric
omniscient|unknowing
on|off
on|off
on|off
oncogenic|nononcogenic
oncotic|antioncotic
onward|backward
opaque|nonopaque
opaque|transparent
open|close
open|closed
open|closed
open|covert
open|shut
open|shut
operable|inoperable
operable|nonoperable
operative|nonoperative
operatively|nonoperatively
ophthalmic|antiophthalmic
opponent|supporter
opportune|inopportune
opposable|nonopposable
opposite|same
opposite|similar
optimist|pessimist
optimistic|pessimistic
or|nor
orchidic|anorchidic
ordinary|extra-ordinary
ordinary|extraordinary
ordinary|special
ordinary|unique
organic|anorganic
organic|inorganic
organic|inorganic
organic|nonorganic
orient|disorient
orient|disorientate
original|unoriginal
osmatic|anosmatic
ostracise|welcome
ostracize|welcome
ought|oughtn't
oughtn't|ought
out|in
out|in
outer|inner
outside|in-door
outside|indoor
outside|indoors
outside|inside
outside|inside
outside|inside
outside|interior
outside|within
outskirts|center
outskirts|centre
overcome|succumb
overcome|succumb
over-come|succumb
over-come|succumb
ovulatory|antiovulatory
pack|unpack
pain|pleasure
pain|pleasure
painful|painless
painfull|painless
painless|painful
painless|painfull
paired|unpaired
palatable|unpalatable
palpable|impalpable
palpable|nonpalpable
palpable|unpalpable
panic|calm
parallel|nonparallel
paralytic|antiparalytic
paralytic|aparalytic
paralytic|nonparalytic
parametric|nonparametric
parasympathomimetic|antiparasympathomimetic
parental|filial
parental|nonparental
parenteral|enteral
parenteral|nonparenteral
parkinsonian|antiparkinsonian
parous|nonparous
paroxysmal|nonparoxysmal
part|whole
participant|spectator
particular|general
passible|impassible
passionate|dispassionate
passionate|passionless
passionless|passionate
passive|active
past|future
past|future
past|futurity
patient|impatient
patient|nonpatient
patriotic|unpatriotic
payment|nonpayment
peace|commotion
peace|war
pedicular|antipedicular
penchant|dislike
penetrable|impenetrable
penitent|impenitent
perceptible|imperceptible
perfect|faulty
perfect|imperfect
perforate|imperforate
periodic|aperiodic
peristaltic|antiperistaltic
permanent|impermanent
permanent|temporary
permeable|impermeable
permissible|impermissible
permit|disallow
permit|forbid
permit|interdict
persistence|nonpersistence
persuasive|dissuasive
persuasive|unpersuasive
perturbable|imperturbable
pervious|imperviable
pervious|impervious
pessimist|optimist
pessimistic|optimistic
phacic|aphacic
phagocytic|antiphagocytic
phakic|aphakic
phlogistic|antiphlogistic
phosphagenic|aphosphagenic
phosphorylate|dephosphorylate
photic|aphotic
photic|nonphotic
phototrophic|nonphototrophic
physical|psychological
physical|unphysical
physician|nonphysician
physiologic|unphysiologic
physiological|unphysiological
pigmented|nonpigmented
pigmented|pigment-less
pigmented|pigmentless
pigmented|unpigmented
pigmentless|pigmented
pigmentless|pigmented
pigmy|giant
pituitary|nonpituitary
placental|aplacental
placental|nonplacental
plain|fancy
planful|planless
planless|planful
plasmic|aplasmic
plasmolyze|deplasmolyze
plausible|implausible
pleasant|nasty
pleasant|repugnant
pleasant|unpleasant
please|displease
pleasing|displeasing
pleasing|unpleasing
pleasurable|unpleasurable
pleasure|pain
pleasure|pain
pleasureful|pleasureless
pleasureless|pleasureful
plentiful|scarce
plentiful|sparse
plenty|lack
pliable|rigid
pneumatic|nonpneumatic
pneumococcic|antipneumococcic
pneumonic|nonpneumonic
podagric|antipodagric
poetry|prose
polar|nonpolar
poliovirus|nonpoliovirus
polite|impolite
polite|rude
political|apolitical
polymerise|depolymerise
polymerize|depolymerize
ponderable|imponderable
poor|good
poor|rich
poor|rich
poor|wealthy
popular|unpopular
populate|depopulate
porosity|nonporosity
porous|nonporous
possible|impossible
potent|impotent
pouched|pouchless
pouchless|pouched
poverty|nonpoverty
poverty|riches
poverty|wealth
power|impotence
power|impotency
power|powerlessness
powerful|feeble
powerful|powerless
powerful|weak
powerless|powerful
powerlessness|power
practicable|impracticable
practicable|unpracticable
praise|blame
praise|blame
praise|criticise
praise|criticism
praise|criticize
precious|nonprecious
predator|prey
predictable|unpredictable
pregnant|nonpregnant
presence|absence
present|absent
pressurized|nonpressurized
pressurized|unpressurized
pretty|ugly
pretty|unsightly
prey|predator
private|public
probable|improbable
probable|unlikely
problematic|nonproblematic
problematic|unproblematic
productive|nonproductive
productive|unproductive
professional|amateur
professional|amateur
professional|nonprofessional
professional|nonprofessional
prohibit|allow
projective|nonprojective
pronounceable|unpronounceable
proper|improper
propitious|unpropitious
proportionate|disproportional
proportionate|disproportionate
prose|poetry
prostatitis|antiprostatitis
protect|attack
protected|endangered
protected|unprotected
protein|nonprotein
proteinase|antiproteinase
protic|aprotic
protozoal|antiprotozoal
proud|humble
prove|confute
prove|disprove
prudent|imprudent
psychical|apsychical
psychomotor|antipsychomotor
psychosis|apsychosis
psychotic|antipsychotic
psychotic|nonpsychotic
psychotropic|nonpsychotropic
ptyalism|aptyalism
public|private
puerperal|nonpuerperal
pull|push
pulmonary|nonpulmonary
punctual|tardy
punctual|unpunctual
punish|reward
punishment|reward
punitive|nonpunitive
pure|contaminated
pure|impure
purposeful|purposeless
purposeless|purposeful
purulent|nonpurulent
push|pull
putrefactive|antiputrefactive
pygmy|giant
pyogenic|antipyogenic
pyogenic|nonpyogenic
pyogenous|apyogenous
pyretic|antipyretic
pyretic|apyretic
pyrexial|apyrexial
pyrogenic|apyrogenic
pyrotic|antipyrotic
qualification|disqualification
qualified|nonqualified
qualified|unqualified
quantitative|nonquantitative
quenchable|quenchless
quenchless|quenchable
question|answer
question|reply
question|reply
quick|slow
quick|slow
quiet|agitate
quiet|loud
quiet|noisy
quietude|inquietude
quotation|misquotation
quote|misquote
rabic|antirabic
rachitic|antirachitic
radiable|nonradiable
radioactive|nonradioactive
rainless|rainy
rainy|rainless
raise|demote
raise|lower
random|nonrandom
randomness|nonrandomness
rarely|frequently
rarely|usually
rational|irrational
rational|nonrational
reactive|nonreactive
reactive|pro-active
reactive|proactive
reactive|unreactive
ready|unready
real|fake
real|sham
realistic|unrealistic
rear|forepart
rear|front
rear|front
rear|head
reasonable|unreasonable
reassuring|nonreassuring
receive|send
reciprocal|nonreciprocal
recommend|disrecommend
reconcilable|irreconcilable
reconcilable|unreconcilable
recondite|obvious
recoverable|irrecoverable
recoverable|unrecoverable
recurrent|nonrecurrent
reduce|enlarge
reduce|expand
reduce|increase
reducible|irreducible
reform|counterreform
refutable|irrefutable
regard|disesteem
regard|disregard
regardful|regardless
regardless|regardful
regenerative|aregenerative
regenerative|nonregenerative
regret|rejoice
regular|irregular
regular|irregular
regularly|irregularly
reject|accept
reject|approve
rejection|acceptance
rejection|nonrejection
rejoice|regret
related|nonrelated
related|unrelated
relative|absolute
relative|nonrelative
relaxed|unrelaxed
relaxed|upset
relevant|irrelevant
reliable|unreliable
reluctant|eager
reluctant|enthusiastic
remarkable|unremarkable
remediable|irremediable
remember|forget
remorseful|remorseless
remorseless|remorseful
removable|irremovable
removable|nonremovable
remove|add
remove|bring
renal|nonrenal
reparable|irreparable
repeatability|nonrepeatability
repeatable|nonrepeatable
repeatable|unrepeatable
repeated|nonrepeated
repeated|unrepeated
repel|appeal
repel|attract
repentant|impenitent
repentant|unrepentant
replaceable|irreplaceable
reply|ask
reply|question
reply|question
representative|misrepresentative
representative|nonrepresentative
representative|unrepresentative
repressible|irrepressible
reproducible|irreproducible
republic|dictatorship
republic|monarchy
repugnant|pleasant
repulsive|attractive
reputable|disreputable
rheumatic|antirheumatic
rheumatoid|nonrheumatoid
rhythmic|arhythmic
rhythmic|nonrhythmic
rhythmical|arhythmical
rhythmicity|nonrhythmicity
rich|poor
rich|poor
riches|poverty
rickettsial|antirickettsial
right|improperly
right|incorrect
right|incorrectly
right|left
right|wrong
right|wrong
rigid|flexible
rigid|pliable
rise|descend
rise|descent
rise|fall
rise|fall
riskful|riskless
riskless|riskful
riskless|risky
risky|riskless
robe|disrobe
rooted|rootless
rooted|unrooted
rootless|rooted
rotation|nonrotation
rotational|nonrotational
rough|smooth
rough|smooth
routine|nonroutine
rude|civil
rude|polite
rural|nonrural
rural|urban
sad|cheerful
sad|glad
sad|happy
sad|merry
sadness|happiness
sadness|joy
safe|unsafe
safety|danger
salinate|de-salt
salinate|desalinate
salinate|desalinise
salinate|desalinize
salinate|desalt
salubrious|insalubrious
same|different
same|opposite
same|other
sane|insane
sanitary|insanitary
sanitary|unsanitary
saponifiable|nonsaponifiable
satiable|insatiable
satisfaction|dissatisfaction
satisfactory|dissatisfactory
satisfactory|unsatisfactory
satisfied|dissatisfied
satisfy|dissatisfy
saturated|unsaturated
savable|unsavable
saveable|unsaveable
scabietic|antiscabietic
scabious|antiscabious
scarce|abundant
scarce|plentiful
scarce|ubiquitous
scarlatinal|antiscarlatinal
scented|scentless
scented|unscented
scentless|scented
schistosomal|antischistosomal
scorbutic|antiscorbutic
scramble|unscramble
scream|whisper
scream|whisper
scrutable|inscrutable
seasonal|nonseasonal
secretory|antisecretory
secretory|asecretory
secure|insecure
security|insecurity
segmental|nonsegmental
segregate|desegregate
seldom|often
seldomly|often
selective|nonselective
selective|unselective
selfish|selfless
selfish|unselfish
selfless|selfish
sell|buy
seller|buyer
semantic|asemantic
seminoma|nonseminoma
send|receive
senile|nonsenile
senior|junior
senior|junior
sensible|insensible
sensitisation|nonsensitisation
sensitise|desensitise
sensitise|desensitize
sensitive|insensitive
sensitive|nonsensitive
sensitive|resistant
sensitive|resistent
sensitization|nonsensitization
sensitize|desensitise
sensitize|desensitize
sentimental|unsentimental
separable|inseparable
separate|combine
separate|connect
separate|join
separate|mix
separate|together
sepsis|asepsis
septate|nonseptate
septated|nonseptated
septic|antiseptic
serious|frivolous
serious|nonserious
serious|silly
serous|nonserous
sexual|nonsexual
sexualise|desexualise
sexualize|desexualize
shakable|unshakable
shakeable|unshakeable
shall|shan't
shallow|deep
shame|honor
shame|honor
shame|honour
shame|honour
shameless|ashamed
shan't|shall
shiny|dingy
shopkeeper|customer
shorten|expand
shorten|lengthen
should|shouldn't
shouldn't|should
shout|whisper
shout|whisper
shrink|expand
shrink|grow
shrink|swell
shudder|steady
shut|open
shut|open
sialagogue|antisialagogue
sialic|antisialic
sick|well
sighted|blind
sighted|sightless
sighted|unsighted
sightless|sighted
sightly|unsightly
silence|noise
silent|noisy
silly|serious
similar|dissimilar
similar|opposite
simple|complex
simple|complicated
sincere|insincere
sinful|sinless
sink|float
sinless|sinful
skeletal|nonskeletal
skinny|fat
sky|terrain
slavery|freedom
sleeved|nonsleeved
sleeved|sleeveless
sleeveless|sleeved
slim|fat
slim|fat
slow|accelerate
slow|quick
slow|quick
slow|swift
small|big
small|giant
small|immense
small|large
small|large
small|nonsmall
smart|stupid
smart|stupid
smile|frown
smile|frown
smoker|nonsmoker
smoking|nonsmoking
smooth|bumpy
smooth|rocky
smooth|rough
smooth|rough
sober|drunk
sober|inebriated
sober|intoxicated
social|antisocial
social|asocial
social|dissocial
social|dyssocial
soluble|indissoluble
soluble|insoluble
solvent|insolvent
some|no
some|none
somebody|nobody
somebody|nobody
some-body|nobody
some-body|nobody
someone|no-one
someone|noone
someone|noöne
something|naught
something|nothing
something|nought
soothe|annoy
sophisticated|naive
sophisticated|naïve
sophisticated|unsophisticated
sorb|desorb
sorrow|joy
sorrow|joy
soulful|soulless
soulless|soulful
south|North
south|North
south|North
south|North
south|north
south|north
south|north
south|north
sparse|plentiful
spasmodic|antispasmodic
speaker|nonspeaker
special|general
special|ordinary
specific|general
specific|nonspecific
specific|unspecific
specifically|generally
specifically|nonspecifically
spectator|participant
spendthrift|miser
spermatozoal|antispermatozoal
spined|spineless
spineless|spined
spineless|spinous
spirited|spiritless
spiritless|spirited
sporogenic|asporogenic
sporous|asporous
stabilise|de-stabilise
stabilise|de-stabilize
stabilise|destabilise
stabilise|destabilize
stability|inconstancy
stability|instability
stability|nonstability
stabilize|de-stabilise
stabilize|de-stabilize
stabilize|destabilise
stabilize|destabilize
stable|nonstable
stable|unstable
stale|fresh
staphylococcal|nonstaphylococcal
staphylococcic|antistaphylococcic
start|halt
start|stop
stationary|nonstationary
steady|shudder
steady|unsteady
stented|stentless
stented|unstented
stentless|stented
stereognosis|astereognosis
sterile|nonsterile
sterile|unsterile
sternal|asternal
steroidal|nonsteroidal
sthenic|asthenic
stimulant|contrastimulant
stop|begin
stop|continue
stop|start
strained|unstrained
strange|normal
strength|weakness
strengthen|weaken
streptolysin|antistreptolysin
stress|unstress
strict|lenient
stringed|stringless
stringless|stringed
strong|feeble
strong|impotent
strong|mild
strong|weak
structural|nonstructural
structured|structure-less
structured|structureless
structured|unstructured
structureless|structured
structureless|structured
student|lecturer
student|teacher
stupid|clever
stupid|intelligent
stupid|smart
stupid|smart
stupidity|intelligence
stupidity|wisdom
sturdy|feeble
sublime|lowly
substantial|insubstantial
substantial|unsubstantial
subtract|add
success|failure
successful|successless
successful|unsuccessful
successless|successful
succumb|over-come
succumb|overcome
sudorific|antisudorific
sufficient|deficient
sufficient|insufficient
sufficient|unsufficient
summer|winter
summer|winter
sunless|sunny
sunny|sunless
superior|inferior
superior|inferior
supplier|customer
supportable|insupportable
supporter|opponent
suppressible|nonsuppressible
suppurative|nonsuppurative
sure|incertain
sure|unsure
surgical|nonsurgical
surgically|nonsurgically
surmountable|insurmountable
surmountable|unsurmountable
survival|death
susceptible|insusceptible
susceptible|resistant
susceptible|resistent
susceptible|unsusceptible
suspicious|suspicionless
suspicious|unsuspicious
sustained|nonsustained
sustained|unsustained
sweatless|sweaty
sweaty|sweatless
swell|shrink
swift|slow
symmetric|asymmetric
symmetric|asymmetrical
symmetric|unsymmetric
symmetrical|asymmetric
symmetrical|asymmetrical
symmetrical|unsymmetrical
symmetry|asymmetry
symmetry|disproportion
symmetry|dissymmetry
symmetry|imbalance
sympathetic|antisympathetic
symptomatic|asymptomatic
symptomatic|nonsymptomatic
synchronous|asynchronous
synchronous|nonsynchronous
synchrony|asynchronism
synchrony|asynchrony
synclitism|asynclitism
synergic|asynergic
synergy|asynergy
synonym|antonym
syphilitic|antisyphilitic
syphilitic|nonsyphilitic
systole|asystole
systolic|asystolic
systolic|diastolic
systolic|diastolic
tactful|tactless
tactless|tactful
tainted|untainted
tame|wild
tangible|impalpable
tangible|intangible
tardy|punctual
tasteful|tasteless
tasteless|tasteful
teach|learn
teachable|unteachable
teacher|student
tearful|dry-eyed
tearful|tearless
tearless|tearful
tell|ask
tempered|untempered
temporary|permanent
tenable|untenable
tenant|landlord
tender|tough
teratogenic|nonteratogenic
teratoid|nonteratoid
terminable|interminable
terrain|sky
terrible|lovely
terrible|marvellous
terrible|marvelous
terrible|wonderful
textured|textureless
textureless|textured
theistic|atheistic
them|us
then|now
there|here
there|here
there|here
thermal|athermal
thermal|nonthermal
thermosystaltic|athermosystaltic
thick|thin
thick|thinly
thin|inspissate
thin|thick
thirstless|thirsty
thirsty|thirstless
thoughtful|thoughtless
thoughtless|thoughtful
thriftless|thrifty
thrifty|thriftless
thrifty|unthrifty
thrombotic|antithrombotic
thyroid|antithyroid
thyroid|nonthyroid
thyroidize|dethyroidize
thyrotoxic|antithyrotoxic
thyrotropic|antithyrotropic
tidy|messy
tight|loose
timely|untimely
tiny|giant
tiny|huge
tiny|immense
tiny|vast
titled|untitled
to|from
together|alone
together|apart
together|apart
together|separate
tolerable|intolerable
tolerant|intolerant
tolerant|nontolerant
tomorrow|yesterday
tomorrow|yesterday
top|bottom
top|bottom
top|bottom
top|bottom
top|bottom
Top|bottom
Top|bottom
Top|bottom
Top|bottom
Top|bottom
TOP|bottom
TOP|bottom
TOP|bottom
TOP|bottom
TOP|bottom
tough|tender
toxic|antitoxic
toxic|atoxic
toxic|nontoxic
toxify|detoxify
toxigenic|atoxigenic
toxin|antitoxin
traceable|untraceable
tractable|intractable
tradable|untradable
tradeable|untradeable
tragedy|comedy
tragic|comic
trained|nontrained
trained|untrained
transmissible|intransmissible
transparent|nontransparent
transparent|opaque
transsexual|nontranssexual
traumatic|atraumatic
traumatic|nontraumatic
treatable|untreatable
tremorless|tremorous
tremorous|tremorless
treponemal|antitreponemal
treponemal|nontreponemal
trichomonal|antitrichomonal
tropical|nontropical
troubled|calm
troubled|untroubled
true|false
true|untrue
trust|distrust
trust|distrust
trust|distrustfulness
trust|doubt
trust|mistrust
trustworthy|untrustworthy
truth|falsehood
truth|falseness
truth|falsity
truth|untruth
truthful|untruthful
trypanosomal|antitrypanosomal
trypsin|antitrypsin
trypsine|antitrypsine
tryptic|antitryptic
tuberculotic|antituberculotic
tuberculous|antituberculous
tuberculous|nontuberculous
tumescent|detumescent
tumorigenic|antitumorigenic
tumourigenic|antitumourigenic
tussive|antitussive
typable|nontypable
typable|untypable
typeable|nontypeable
typeable|untypeable
typhoid|antityphoid
typhoid|nontyphoid
typic|atypic
typical|atypical
typical|nontypical
typical|untypical
ubiquitous|scarce
ugliness|beauty
ugly|beautiful
ugly|handsome
ugly|pretty
ulcerative|antiulcerative
ulcerative|antiulcerative
ulcerative|nonulcerative
unability|ability
unable|able
unacceptable|acceptable
unaccessible|accessible
unadaptable|adaptable
unaffected|affected
unafraid|afraid
unaggressive|aggressive
unalignable|alignable
unaltered|altered
unambitious|ambitious
unamenable|amenable
unwilling|willing
unzip|zip
up|down
up|down
up|down
up|down-ward
up|downward
up|downwardly
up|downwards
upset|relaxed
upstairs|downstair
upstairs|downstairs
upstairs|downstairs
upwards|down-ward
upwards|downward
upwards|downwardly
upwards|downwards
uratic|antiuratic
urban|rural
uresis|anuresis
urgent|leisurely
urgent|nonurgent
us|them
used|unused
usual|unusual
usually|rarely
valent|nonvalent
valid|invalid
valley|hill
valley|mountain
valuable|valueless
valuable|worthless
valued|valueless
valueless|valuable
valueless|valued
valved|valve-less
valved|valveless
valveless|valved
valveless|valved
valvular|avalvular
valvular|nonvalvular
vaned|vaneless
vaneless|vaned
variable|constant
variable|constant
variable|invariable
vascular|avascular
vascular|nonvascular
vascularise|devascularise
vascularize|devascularize
vast|tiny
vegetative|nonvegetative
veil|unveil
veined|veinless
veinless|veined
veinless|veiny
veiny|veinless
veneration|desecration
venereal|antivenereal
venereal|nonvenereal
venom|antivenom
venomous|antivenomous
venomous|nonvenomous
verbally|nonverbally
vertebrate|invertebrate
vertebrate|nonvertebrate
vertical|horizontal
vertical|horizontal
viability|nonviability
viable|nonviable
victory|defeat
vigilant|inattentive
vincible|invincible
violable|inviolable
violence|nonviolence
violent|gentle
violent|nonviolent
viral|antiviral
viral|nonviral
virulence|nonvirulence
virulent|avirulent
virulent|nonvirulent
visible|invisible
visualisation|nonvisualisation
visualization|nonvisualization
vitalise|devitalise
vitalise|devitalize
vitalize|devitalise
vitalize|devitalize
vivisectionist|antivivisectionist
voiced|unvoiced
voiced|voiceless
voiceless|enfranchised
voiceless|voiced
voluntary|involuntary
vowel|consonant
vulnerable|invulnerable
wanted|unwanted
war|peace
warm|chilly
warm|cold
warm|cool
was|wasn't
wasn't|was
wasteful|wasteless
wasteless|wasteful
water|land
weak|powerful
weak|strong
weaken|fortify
weaken|strengthen
weakness|strength
wealth|impoverishment
wealth|poverty
wealthy|poor
wearable|unwearable
weightbearing|nonweightbearing
welcome|ostracise
welcome|ostracize
welcome|unwelcome
well|bad
well|badly
well|ill
well|poorly
well|poorly
well|sick
well|unwell
well-versed|unschooled
were|weren't
weren't|were
west|East
west|East
west|east
west|east
west|east
west|east
West|East
West|East
West|east
West|east
West|east
West|east
whisper|scream
whisper|scream
whisper|shout
whisper|shout
whisper|yell
whisper|yell
white|black
white|nonwhite
whole|fractional
whole|part
wide|narrow
width|length
wild|tame
will|won't
willing|unwilling
windowed|windowless
windowless|windowed
winged|wingless
wingèd|wingless
wingless|winged
wingless|wingèd
winner|also-ran
winner|loser
winter|summer
winter|summer
wisdom|foolishness
wisdom|stupidity
wise|foolish
wise|unwise
with|without
with|without
with|withoute
with|wythoute
with|wythowt
with|wythowte
withdraw|deposit
withdraw|engage
within|outside
without|with
without|with
withoute|with
witless|witty
witty|witless
wonderful|terrible
won't|will
woody|nonwoody
wordless|wordy
wordy|wordless
worse|better
worse|better
worse|better
worse|better
worse|better
worse|better
worse|bettor
worst|best
worst|best
worst|best
worst|best
worst|best
worst|best
worthful|worthless
worthless|valuable
worthless|worthful
would|wouldn't
wouldn't|would
wrinkled|unwrinkled
wrinkled|wrinkleless
wrinkleless|wrinkled
wrinkleless|wrinkly
wrong|correct
wrong|correctly
wrong|reight
wrong|right
wrong|right
wrong|rite
wythoute|with
wythowt|with
wythowte|with
xenic|antixenic
xerophthalmic|antixerophthalmic
xerotic|antixerotic
yell|whisper
yell|whisper
yesterday|tomorrow
yesterday|tomorrow
yolked|yolkless
yolkless|yolked
young|aged
young|aged
young|elderly
young|elderly
young|mature
younger|older
zenith|nadir
zip|unzip
zygous|azygous
zymotic|antizymotic