SYNONYMS
diabolical, fiendish, devilish, demonic, demoniac, demoniacal, Mephistophelian
hellish, infernal, accursed, wicked, evil, sinful, iniquitous, nefarious, vile, foul, abominable, unspeakable, loathsome, monstrous, atrocious, heinous, hideous, odious, horrible, horrifying, shocking, appalling, dreadful, awful, terrible, ghastly, abhorrent, despicable, damnable, villainous, depraved, perverted, ungodly, dark, black, black-hearted, immoral, amoral
vicious, cruel, savage, brutish, bestial, barbaric, barbarous
rare cacodemonic, egregious, flagitious, facinorous