Synonyms of maniacal

1 Syllable
mad
2 Syllables
loonier, crazier, schizoid, raving, manic, apest, loco, schizzo, aper, brainsick, violent, loony, whacko, craziest, moonstruck, frenzied, berserk, crazy
3 Syllables
insane, lunatic, demoniac, demonic, delirious, demented, deranged, crackbrained, satanic
4 Syllables
schizophrenic, homicidal, demoniacal