Synonyms for “demented”

adjective

1. =  mad, crazy, foolish, daft (informal), frenzied, distraught, manic, insane, crazed, lunatic, unbalanced, deranged, idiotic, unhinged, dotty (slang, mainly, British), loopy (informal), crackpot (informal), out to lunch (informal), barking mad (slang), barking (slang), maniacal, gonzo (slang), doolally (slang), off your trolley (slang), up the pole (informal), non compos mentis (Latin), not the full shilling (informal), crackbrained, wacko or whacko (slang), off the air (Australian, slang), porangi (New Zealand) • Her warnings were dismissed as the ramblings of a demented old woman.
   opposites: sane, sound, normal, reasonable, sensible, rational, all there (informal), lucid, compos mentis (Latin), in your right mind