acrimony, altercation, animosity, animus, argument, avengement, bad blood, bicker, bitter feeling, bitterness, blood feud, brawl, broil, conflict, contention, controversy, dispute, donnybrook, donnybrook fair, embroilment, enmity, feud, fight, fliting, fracas, fuss, getting even, hard feelings, hatred, ill blood, ill feeling, ill will, imbroglio, logomachy, open quarrel, polemic, quarrel, rancor, reprisal, retaliation, revanche, revanchism, revenge, rhubarb, rivalry, row, set-to, sharp words, slanging match, snarl, soreness, sourness, spat, squabble, strife, sweet revenge, tiff, tussle, vengeance, venom, virulence, vitriol, words, wrangle