adversary, adversative, adverse, adversive, alien, antagonistic, anti, antipathetic, antithetic, antonymous, at cross-purposes, balancing, breakaway, clashing, compensating, competitive, con, conflicting, confronting, contradicting, contradictory, contradistinct, contrapositive, contrarious, contrary, contrasted, converse, counter, counteractant, counteracting, counteractive, counterbalancing, counterpoised, countervailing, counterworking, cranky, cross, crotchety, dead against, disaccordant, discordant, discrepant, dissentient, dissident, enemy, eyeball to eyeball, fractious, hostile, inconsistent, inimical, inverse, negative, nonconformist, noncooperative, obstinate, obverse, opponent, opposed, opposing, opposite, oppositive, oppugnant, overthwart, perverse, reactionary, recalcitrant, refractory, renitent, repugnant, resistant, reverse, revolutionary, rival, squared off, uncooperative, unfavorable, unfriendly, unpropitious