collide (v.)

• antagonize
• atomize
• bang
• battle
• box
• brawl
• break
• broil
• bump
• cannon
• carom
• clash
• close
• combat
• concuss
• conflict
• confute
• contend
• contest
• contradict
• contravene
• counter
• counteract
• counterattack
• counterpose
• countervail
• crash
• cross
• crump
• crunch
• differ
• disaccord
• disagree
• dissent
• duel
• encounter
• fence
• feud
• fight
• foul
• fragment
• grapple
• hit
• hurt
• hurtle
• impinge
• jangle
• jar
• jostle
• joust
• knock
• meet
• mismatch
• mismate
• negate
• object
• oppose
• oppugn
• percuss
• pulverize
• quarrel
• ram
• resist
• riot
• scramble
• scrap
• scuffle
• shatter
• sideswipe
• skirmish
• smash
• spar
• splinter
• strike
• strive
• struggle
• tilt
• tourney
• tussle
• vary
• war
• whomp
• wrestle