Synonyms of infernal

1 Syllable

stark

2 Syllables

starker, lower, nether, monstrous, utter, utters, starkest, blasted, damndest, blamed, chthonian, cussed, hellborn, damned, ogreish, wicked, hellish, voodooed, quiter, cursed, fiendish

3 Syllables

plutonic, diabolic, damnable, malicious, unbounded, confounded, demonic, cimmerian, ferine, devilish, doggone, snakebit, damnedest, satanic, accursed, all-fired, sulphurous, nefarious

4 Syllables

diabolical, subterranean, demonical, malevolent, unrelieved, demoniacal, foredoomed, blankety-blank, execrable, satanical

5 Syllables

mephistophelian