Contender

Noun

 * 1) Someone who competes with one or more other people

Thesaurus
battler, belligerent, belted knight, bickerer, blade, bravo, brawler, bully, bullyboy, combatant, competitor, contestant, corrival, disputant, duelist, emulator, enforcer, entrant, fencer, feuder, fighter, fighting cock, foilsman, gamecock, gladiator, goon, gorilla, hatchet man, hood, hoodlum, hooligan, jouster, knight, militant, player, plug-ugly, quarreler, rioter, rival, rough, rowdy, ruffian, sabreur, scrapper, scuffler, squabbler, strong arm, strong-arm man, strong-armer, struggler, swashbuckler, sword, swordplayer, swordsman, the field, thug, tilter, tough, tussler, vier, wrangler