Synonyms and Antonyms of maniacal
- the movie's villain was a just a clichéd axe-wielding nutcase with a maniacal laugh
balmy, barmy [chiefly British], bats, batty, bedlam, bonkers, brainsick, bughouse [slang], certifiable, crackbrained, cracked, crackers, crackpot, cranky [dialect], crazed, crazy, cuckoo, daffy, daft, demented, deranged, fruity [slang], gaga, haywire, insane, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, mental, meshuga (or meshugge), moonstruck, non compos mentis, nuts, nutty, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish]
dotty, fey, loopy, off, potty [chiefly British], teched (or tetched), touched
aberrant, delirious, delusional, delusionary, disordered, disturbed, neurotic, obsessive-compulsive, paranoiac (also paranoic), paranoid (also paranoidal), schizoid, schizophrenic, sociopathic
eccentric, odd, oddball, pixilated (also pixillated), queer, strange
amok (or amuck), ape, ballistic, bananas, berserk, nuclear
distracted, distraught, frantic, frenzied, haywire, hysterical (also hysteric), raving, wigged-out
around the bend, off one's gourd, off one's head, off one's rocker, out of one's head (or mind), out to lunch [slang]