abhorrence, abomination, aggression, aggressiveness, allergy, animosity, animus, annulling, antipathy, antithesis, argumentation, aversion, backlash, bad blood, bellicism, bellicosity, belligerence, belligerency, chauvinism, clash, clashing, cold sweat, collision, combativeness, competition, con, conflict, confrontation, confutation, contention, contentiousness, contradiction, contradistinction, contraindication, contraposition, contrariety, contrariness, contrast, controversy, counteraction, counterposition, counterworking, crankiness, creeping flesh, cross-purposes, crotchetiness, despitefulness, difference, disaccord, disaccordance, disagreement, discord, discordance, discordancy, discrepancy, disgust, disharmony, disparity, dissension, dissent, dissidence, dissonance, disunion, disunity, divergence, diversity, enmity, faction, ferocity, fierceness, fight, fractiousness, friction, hate, hatred, horror, hostility, inaccordance, incongruity, inconsistency, inequality, inimicalness, interference, jarring, jingoism, kick, loathing, malevolence, malice, malignity, martialism, militancy, militarism, mortal horror, nausea, negation, negativeness, nonconformity, noncooperation, nullification, obstinacy, oppositeness, opposition, opposure, oppugnance, oppugnancy, perverseness, perversity, polarity, pugnaciousness, pugnacity, quarrelsomeness, rancor, reaction, recalcitrance, recoil, refractoriness, renitency, repercussion, repugnance, repulsion, resistance, revolt, rivalry, saber rattling, showdown, shuddering, spite, spitefulness, strife, swimming upstream, truculence, uncooperativeness, unfriendliness, unharmoniousness, unpeacefulness, variance, vying, warmongering, warpath, withstanding
contrariety, contrast, foil, antithesis, oppositeness, contradiction, antagonism
, clashing, repugnance, inversion, the opposite, the reverse, the inverse, the converse, the antipodes, the antithesis, the other extreme, contrary, contrarious, contrariant, opposite, counter, dead against, converse, reverse, opposed, antithetical, contrasted, antipodean, antagonistic, opposing, conflicting, inconsistent, contradictory, at cross purposes, negative, hostile, differing toto coelo, diametrically opposite, diametrically opposed, as opposite as black and white, as opposite as light and darkness, as opposite as fire and water, as opposite as the poles, as different as night and day, Hyperion to a satyr, quite the contrary, quite the reverse, no such thing, just the other way, tout au contraire, contrarily, contra, contrariwise, per contra, on the contrary, nay rather, vice versa, on the other hand, all concord's born of contraries, Thesis, antithesis, synthesis.
, oppugnancy, oppugnation, impugnation, contrariety, contravention, counteraction, counterplot, cross fire, undercurrent, head wind, clashing, collision, conflict, competition, two of a trade, rivalry, emulation, race, absence of aid, resistance, restraint, hindrance, opposing, opposed, adverse, antagonistic, contrary, at variance, at issue, at war with, unfavorable, unfriendly, hostile, inimical, cross, unpropitious, in hostile array, front to front, with crossed bayonets, at daggers drawn, up in arms, resistant, competitive, emulous, against, versus, counter to, in conflict with, at cross purposes, against the grain, against the current, against the stream, against the wind, against the tide, with a headwind, with the wind ahead, with the wind in one's teeth, in spite, in despite, in defiance, in the way, in the teeth of, in the face of, across, athwart, overthwart, where the shoe pinches, in spite of one's teeth, though, even, quand meme, per contra, nitor in adversum.
counteraction, opposition, contrariety, antagonism
, polarity, clashing, collision, interference, inhibition, resistance, renitency, friction, reaction, retroaction, counterblast, neutralization, vis inertiae, check, voluntary opposition &c, voluntary resistance, repression, opposites, action and reaction, yang and yin, yang-yin (contrariety), counteracting, antagonistic, conflicting, retroactive, renitent, reactionary, contrary, although, in spite of, against, for every action there is a reaction, equal in force and opposite in direction.