Synonyms of demented

1 Syllable

daft, mad, queer, maer

2 Syllables

wacky, queerer, schizoid, ravers, apest, queerest, madder, loony, maniac, moonstruck, frenzied, buggy, furious, unglued, crackers, psycho, daffy, buggies, crazier, distraught, nutty, maddest, craziest, fruity, crazy, daffier, crazed, dafter, dottier, nuttiest, daftest, loco, schizzo, aper, brainsick, whacko, wackiest, unsound, nuttier, loonier, dotty, manic, foolish, wackier, schitzy, berserk

3 Syllables

flipped-out, distracted, off-the-wall, psychotic, unbacked, ireful, lunatic, unhinged, insane, maniacal, unscrewed, idiotic, possessed, deranged, bananas, delirious, crackbrained, hare-brained, frenetic, bemused, furibund

4 Syllables

irrational, certifiable, unreasoning, cockamamie, hysterical, psychopathic, schizophrenic, unbalanced, bedlamite

6 Syllables

manic-depressive