Synonyms and related words :
bitter-ender, brawler, defendant, diehard, disputant, dissentient, dissident, filibuster, filibusterer, frustrater, hinderer, impeder, intransigent, irreconcilable, last-ditcher, litigant, marplot, naysayer, negativist, noncooperator, objector, obstructer, obstructive, opposer, oppositionist, plaintiff, protester, quarreler, resister, scrapper, thwarter, wrangler