apostasy vs. tergiversation
apostasy vs. defection
adaptation vs. adjustment
adaptation vs. adaption
alteration vs. modification
adjustment vs. alteration
alteration vs. revision
alteration vs. change
adjustment vs. registration
adjustment vs. allowance
abnegation vs. denial
anathematisation vs. anathematization
adjournment vs. dissolution
assassination vs. blackwash
abolishment vs. abolition
abortion vs. miscarriage
aborticide vs. feticide
abrogation vs. repeal
abrogation vs. annulment
annulment vs. invalidation
annulment vs. revocation
asphyxiation vs. suffocation
annihilation vs. obliteration
annihilation vs. disintegration
atomisation vs. atomization
atomization vs. fragmentation
authorship vs. paternity
authorship vs. composition
authorship vs. penning
authorship vs. writing
accession vs. entree
accession vs. assenting
accession vs. addition
activating vs. activation
activation vs. energizing
attack vs. attempt
approach vs. attack
attack vs. onslaught
attack vs. blast
attack vs. snipe
aggress vs. attack
assail vs. attack
assault vs. attack
arousal vs. rousing
arousal vs. foreplay
arousal vs. stimulation
abreaction vs. catharsis
abreaction vs. katharsis
amelioration vs. melioration
amelioration vs. betterment
advancement vs. progress
advancement vs. progression
advancement vs. procession
advance vs. advancement
advancement vs. promotion
access vs. approach
access vs. entree
advance vs. rise
advance vs. approach
advance vs. feeler
advance vs. overture
advance vs. betterment
advance vs. progress
advance vs. gain
advance vs. boost
advance vs. supercharge
advance vs. win
advance vs. raise
advance vs. further
advance vs. encourage
advance vs. promote
advance vs. beforehand
animalization vs. brutalization
animalisation vs. brutalization
airing vs. ventilation
airing vs. spreading
airing vs. dissemination
amble vs. promenade
amble vs. saunter
amble vs. stroll
amble vs. perambulation
amble vs. mosey
abasement vs. humiliation
abasement vs. degradation
approach vs. near
approach vs. coming
airmanship vs. aviation
air vs. aura
air vs. atm
air vs. atmosphere
air vs. airwave
air vs. strain
air vs. line
air vs. tune
air vs. melody
air vs. breeze
air vs. zephyr
air vs. fire
air vs. earth
air vs. water
air vs. vent
air vs. ventilate
air vs. bare
air vs. publicize
air vs. publicise
air vs. beam
air vs. broadcast
air vs. send
air vs. transmit
aerate vs. air
acrobatics vs. aerobatics
acrobatics vs. stunting
acrobatics vs. tumbling
ascent vs. rise
ascent vs. raise
ascension vs. rise
ascending vs. rise
abseil vs. rappel
airlift vs. lift
acceleration vs. quickening
acceleration vs. speedup
agitation vs. excitement
agitation vs. turmoil
agitation vs. upheaval
agitation vs. hullabaloo
agitation vs. unrest
agitation vs. fermentation
agitation vs. ferment
agitation vs. tempestuousness
abatement vs. suspension
aggravation vs. exacerbation
aggravation vs. irritation
aggravation vs. provocation
aggravation vs. exasperation
attrition vs. contrition
attrition vs. contriteness
attrition vs. detrition
attrition vs. grinding
abrasion vs. attrition
attrition vs. corrasion
addition vs. plus
addition vs. summation
addition vs. improver
addition vs. increase
admiration vs. appreciation
appreciation vs. taste
appreciation vs. perceptiveness
appreciation vs. discernment
appreciation vs. grasp
appreciation vs. hold
annotating vs. annotation
annotation vs. notation
annotation vs. note
accrual vs. accumulation
accruement vs. accumulation
accumulation vs. collection
accumulation vs. aggregation
accumulation vs. assemblage
accretion vs. accumulation
augmentation vs. increase
amplification vs. elaboration
amplification vs. gain
alleviation vs. easing
alleviation vs. relief
alleviation vs. assuagement
aggrandisement vs. aggrandizement
aggrandizement vs. elevation
admixture vs. mix
admixture vs. intermixture
admixture vs. alloy
annealing vs. tempering
ablation vs. extirpation
arson vs. incendiarism
activeness vs. activity
atrocity vs. inhumanity
atrocity vs. barbarity
atrociousness vs. atrocity
atrocity vs. barbarousness
atrocity vs. heinousness
annoyance vs. irritation
annoyance vs. vexation
annoyance vs. infliction
annoyance vs. pain
annoyance vs. bother
annoyance vs. botheration
annoyance vs. chafe
aggravator vs. annoyance
Anglicism vs. Britishism
abuse vs. maltreatment
abuse vs. misuse
abuse vs. insult
abuse vs. revilement
abuse vs. contumely
abuse vs. vilification
abuse vs. pervert
abuse vs. shout
abuse vs. blackguard
abuse vs. clapperclaw