brawler

a person who takes part in a dispute every couple has marital problems, but those two are heavyweight brawlers in a seriously dysfunctional relationship Synonyms arguer, argufier, bickerer, disputant, debater, disputer, fighter, quarreler (or quarreller), scrapper, squabbler, wranglerRelated Words advocate, codefendant, defendant, plaintiff, pleader; challenger, contender, contestant, skirmisher; fusser, nitpicker, pettifogger, quibbler