Fighting

• altercation
• argument
• battle
• battle royal
• brawl
• broil
• clash
• combat
• conflict
• contention
• contest
• contretemps
• dispute
• dogfight
• donnybrook
• duel
• duke it out
• feud
• fight
• fisticuffs
• flap
• fracas
• fray
• free-for-all
• go to the mat
• gunfight
• hammer and tongs
• horseplay
• infighting
• joust
• knock-down-drag-out
• melee
• mix-up
• quarrel
• roughhouse
• row
• ruckus
• rumble
• rumpus
• run-in
• scrap
• scrape
• scuffle
• set-to
• shootout
• shoving match
• skirmish
• spat
• squabble
• struggle
• tiff
• tussle
• vendetta
• war