Synonyms to hardheartedness

animosity, acerbity, acid, acidity, acidulousness, acrimony, animus, antagonism, antipathy, asperity, bad blood, bad feeling, bile, bitter feeling, bitter resentment, bitterness, bitterness of spirit, causticity, choler, contempt, detestation, disaffinity, enmity, feud, gall, gnashing of teeth, hard feelings, hatred, heartburning, hostility, ill blood, ill feeling, ill will, immediate dislike, loathing, malevolence, malice, personality conflict, rancor, rankling, resentment, slow burn, soreness, sourness, spleen, vendetta, venom, virulence, vitriol, armor, Philistinism, aegis, armament, armature, armor plate, bard, beaver, body armor, brassard, breastplate, buckler, bulletproof vest, callosity, callousness, callus, chain armor, chain mail, chitin, cloak, coat of mail, coif, corselet, cortex, cover, cuirass, elytron, episperm, flintiness, formidable defenses, gas mask, gauntlet, guard, habergeon, hard heart, hard shell, hardenedness, hardness, hardness of heart, harness, hauberk, headpiece, heart of stone, helm, helmet, imperviousness, induration, insensitiveness, insensiti