antagonism, antipathy, bad blood, clashing, collision, competition, competitiveness, conflict, contention, contrariety, contrariness, controversy, covetousness, cross-purposes, cutthroat competition, disaccord, discord, dispute, dissension, emulation, enmity, enviousness, envy, feud, fractiousness, friction, gamesmanship, grudging, grudgingness, hostility, inimicalness, invidia, invidiousness, jealousy, jockeying, lifemanship, negativeness, noncooperation, obstinacy, one-upmanship, oppugnancy, perverseness, recalcitrance, refractoriness, repugnance, strife, striving, struggle, tug-of-war, uncooperativeness, vying, warfare