Kilkenny cats, altercation, antagonism, apologetics, apologia, apology, argument, argumentation, bicker, bickering, blood feud, brawl, broil, casuistry, cat-and-dog life, clashing, combat, conflict, confrontation, contention, contentiousness, contest, contestation, contradiction, cut and thrust, debate, defense, difference, disaccord, disaccordance, disagreement, discord, discordance, discordancy, discrepancy, disharmony, disparity, disputation, dispute, dissension, dissent, dissidence, dissonance, disunion, disunity, divergence, diversity, donnybrook, donnybrook fair, embroilment, enmity, faction, falling-out, feud, fight, fighting, fliting, flyting, fracas, fuss, hassle, hostility, hubbub, hurrah, imbroglio, inaccordance, inequality, jarring, litigation, logomachy, miff, negation, open quarrel, opposition, oppugnancy, paper war, passage of arms, polemic, polemics, quarrel, quarreling, quarrelsomeness, questioning, repugnance, rhubarb, rumpus, scrapping, set-to, sharp words, slanging match, snarl, spat, squabble, squabbling, strife, struggle, tiff, tussle, unharmoniousness, variance, vendetta, verbal engagement, war, war of words, warfare, words, wrangle, wrangling