antagonism, antipathy, bad blood, clashing, collision, competing, competition, competitive, conflict, contrariety, contrariness, cross-purposes, cutthroat, cutthroat competition, disaccord, dissension, emulation, emulous, enmity, fractiousness, friction, gamesmanship, hostility, in competition, in rivalry, inimicalness, jockeying, lifemanship, negativeness, noncooperation, obstinacy, one-upmanship, oppugnancy, perverseness, recalcitrance, refractoriness, repugnance, rival, rivaling, rivalry, uncooperativeness