hard-heartedness, mercilessness, pitilessness, ruthlessness, uncharitableness

reprisal, requital, retaliation, retribution, revenge, vengeance

venom, vindictiveness, virulence, vitriol

atrocity, barbarity, brutality, cruelty, sadism, savageness, savagery, truculence, viciousness, violence, wantonness

castigation, chastisement, discipline, punishment, scolding

abhorrence, abomination, detestation, execration, hate, hatred, loathing

cattiness, malevolence, malice, maliciousness, malignancy, malignity, meanness, nastiness, spite, spitefulness, spleen

animosity, antagonism, antipathy, bitterness, enmity, gall, grudge, hostility, jealousy, pique, resentment

bile, jaundice, rancor

hatefulness, invidiousness

coarseness, hardness, harshness, roughness