Synonyms of brutally

2 Syllables
cruelly, meanly, harshly, grimly
3 Syllables
rowdily, hideously, wrongfully, monstrously, malignly, heinously, fiercely, scathingly, gratingly, unkindly, unjustly, ruthlessly, viciously, brutishly, callously, ferally, heartlessly
4 Syllables
boisterously, spitefully, murderously, ferociously, barbarously, frighteningly, vengefully, venomously, tigerishly, grotesquely, relentlessly, outrageously, savagely, mercilessly, atrociously, hardheartedly, inhumanly, pitilessly
5 Syllables
unrelentingly, demoniacally, maleficiently, vindictively, oppressively, restrictively, tyrannically, inexorably, barbarically, diabolically, inhumanely, remorselessly