abjure
air
analyze
answer
answer conclusively
argue down
assert the contrary
be at cross-purposes
be contrary to
be opposed to
belie
break
call into question
canvass
challenge
clash
comment upon
conflict
conflict with
confound
confute
consider
contest
contradict
contrapose
contrast with
contravene
counter
counteract
counterbalance
countercheck
counterpoise
counterpose
countervail
counterwork
cross
crush
deal with
debate
defeat
deliberate
deliberate upon
demolish
deny
disaffirm
disallow
disavow
disprove
controverted
controverting
controverts
controversial
controversialist
controversy
controverter
controvertible
incontrovertible