Draconian, Tartarean, animal, anthropophagous, atrocious, barbaric, barbarous, beastly, bestial, bloodthirsty, bloody, bloody-minded, bowelless, brutal, brutalized, brute, brutish, callous, cannibalistic, cruel, cruel-hearted, demoniac, demoniacal, devilish, diabolic, dog-eat-dog, fell, feral, ferine, ferocious, fiendish, fiendlike, fierce, flinty, hard, harsh, heartless, hellish, implacable, inclement, inexorable, infernal, inhuman, inhumane, kill-crazy, malign, malignant, mean, merciless, mortal, murderous, noncivilized, pitiless, relentless, remorseless, sadistic, sanguinary, sanguineous, satanic, savage, severe, sharkish, slavering, subhuman, tameless, tough, truculent, unappeasable, unchristian, uncivilized, uncompassionate, uncompassioned, unfeeling, unflinching, unforgiving, ungentle, unhuman, unmerciful, unpitiful, unpitying, unrelenting, unremorseful, unsympathetic, unsympathizing, untamed, unyielding, vicious, wild, without mercy, wolfish
malevolence, bad intent, bad intention, unkindness, diskindness, ill nature, ill will, ill blood, bad blood, enmity, hate, malignity, malice, malice prepense, maliciousness, spite, despite, resentment, uncharitableness, incompassionateness, gall, venom, rancor, rankling, virulence, mordacity, acerbity churlishness, hardness of heart, heart of stone, obduracy, cruelty, cruelness, brutality, savagery, ferity, ferocity, barbarity, inhumanity, immanity, truculence, ruffianism, evil eye, cloven foot, torture, vivisection, ill turn, bad turn, affront, outrage, atrocity, ill usage, intolerance, persecution, tender mercies, unkindest cut of all, malevolent, unbenevolent, unbenign, ill-disposed, ill-intentioned, ill-natured, ill-conditioned, ill-contrived, evil-minded, evil- disposed, black-browed, malicious, malign, malignant, rancorous, despiteful, spiteful, mordacious, caustic, bitter, envenomed, acrimonious, virulent, unamiable, uncharitable, maleficent, venomous, grinding, galling, harsh, disobliging, unkind, unfriendly, ungracious, inofficious, invidious, uncandid, churlish, surly, sullen, cold, cold-blooded, cold-hearted, black-hearted, hard-hearted, flint-hearted, marble-hearted, stony-hearted, hard of heart, unnatural, ruthless
, relentless, cruel, brutal, brutish, savage, savage as a bear, savage as a tiger, ferine, ferocious, inhuman, barbarous, barbaric, semibarbaric, fell, untamed, tameless, truculent, incendiary, bloodthirsty, atrocious, bloodyminded, fiendish, fiendlike, demoniacal, diabolic, diabolical, devilish, infernal, hellish, Satanic, Tartaran, malevolently, with bad intent, cruel as death, hard unkindness' alter'd eye, homo homini lupus, mala mens, malus animus, rich gifts wax poor when givers prove unkind, sharp-tooth'd unkindness.
pitilessness, inclemency, severity, malevolence, pitiless, merciless, ruthless
, bowelless, unpitying, unmerciful, inclement, grim-faced, grim-visaged, incompassionate, uncompassionate, inexorable, harsh, unrelenting.
revenge, revengement, vengeance, avengement, avengeance, sweet revenge, vendetta, death feud, blood for blood retaliation, day of reckoning, rancor, vindictiveness, implacability, malevolence, ruthlessness, avenger, vindicator, Nemesis, Eumenides, revengeful, vengeful, vindictive, rancorous, pitiless, ruthless
, rigorous, avenging, unforgiving, unrelenting, inexorable, stony-hearted, implacable, relentless, remorseless, aeternum servans sub pectore vulnus, rankling, immitigable, manet ciratrix, manet alid mente repostum, dies irae dies illa, in high vengeance there is noble scorn, inhumanum verbum est ultio, malevolus animus abditos dentes habet, now infidel I have thee on the hip.