adversary, adversative, adverse, alien, antagonistic, anti, antipathetic, antithetic, clashing, competitive, complaining, con, conflicting, contradictory, contrary, counter, cross, disaccordant, disputatious, disputing, dissentient, dissenting, enemy, fractious, hostile, indocile, inimical, insubordinate, intractable, negative, noncooperating, objecting, obstinate, obstructive, on the barricades, opponent, opposed, opposing, opposite, oppositional, oppositive, oppugnant, overthwart, perverse, proof against, protesting, rebellious, recalcitrant, refractory, reluctant, renitent, repellent, repugnant, resistant, resisting, resistive, retardant, retardative, rival, uncompliant, uncooperative, unfavorable, unfriendly, unpropitious, unsubmissive, unyielding, up in arms, withstanding