Synonyms of murderously

2 Syllables
amuck
3 Syllables
brutally, wickedly, violently, unkindly, ruthlessly, viciously, brutishly, callously, ferally, heartlessly
4 Syllables
savagely, mercilessly, atrociously, barbarously, pitilessly
5 Syllables
destructively, barbarically, demoniacally, inhumanely, remorselessly