Synonyms of viciously

2 Syllables
wrongly, cruelly, lewdly
3 Syllables
corruptly, heartlessly, rowdily, brutally, wickedly, malignly, fiercely, harmfully, unkindly, ruthlessly, callously, brutishly, ferally
4 Syllables
boisterously, hatefully, depravedly, spitefully, immorally, frighteningly, ferociously, murderously, tigerishly, obscenely, savagely, maliciously, mercilessly, atrociously, barbarously, inhumanly, pitilessly
5 Syllables
demoniacally, maleficiently, suggestively, barbarically, unscrupulously, reprehensibly, inhumanely, remorselessly