controvert (v.)

• abjure
• air
• analyze
• answer
• belie
• break
• canvass
• challenge
• clash
• conflict
• confound
• confute
• consider
• contest
• contradict
• contravene
• counter
• counteract
• counterbalance
• countercheck
• counterpoise
• counterpose
• countervail
• cross
• crush
• debate
• defeat
• deliberate
• demolish
• deny
• disallow
• disavow
• disclaim
• discuss
• dismiss
• disown
• disprove
• dispute
• evert
• examine
• finish
• floor
• forswear
• gainsay
• handle
• impugn
• investigate
• negate
• nonplus
• nullify
• offset
• oppose
• oppugn
• overthrow
• overturn
• overwhelm
• parry
• question
• rap
• reason
• rebut
• recant
• refute
• reject
• renounce
• repudiate
• retract
• review
• revoke
• settle
• sift
• silence
• squash
• squelch
• study
• subvert
• talk
• traverse
• treat
• undermine
• upset
• ventilate