contender

I noun adversary, adverse party, antagonist, appellant, applicant, arguer, aspirant, campaigner, candidate, challenger, charger, claimant, combatant, competitor, complainant, contestant, contester, controversialist, corrival, debater, denouncer, disputant, entrant, examinee, feuder, fighter, foe, libelant, litigant, litigator, nominee, office-seeker, opponent, opposer, opposition, oppositionist, party, party to a suit, petitioner, polemist, the prosecution, pugilist, respondent, rival, striver, suitor II index adversary, aggressor, appellant, candidate, contestant, disputant, foe, litigant, opponent, party (litigant), peer, rival