Synonyms of insanity

1 Syllable
bs
2 Syllables
grabbers, frenzies, folly, mania, frenzy, madness, phobia
3 Syllables
idiocy, psychosis, delusion, hysteria, lunacies, witlessness, nuttiness, flakiness, wackiness, foolishness, craziness, carrying-on, dementia, neuroses, absurdness, dotage, idiocies, lunacy, illusion, delirium, neurosis, cretinism, foolery, distraction, deliriums, flapdoodle
4 Syllables
aberration, tomfoolery, psychopathy, absurdities, inanity, hokey-pokey, senselessness, maladjustment, mischief-making, absurdity, unwiseness, derangement, unbalance
5 Syllables
asininity, preposterousness, alienation, imbecility, hallucination
6 Syllables
illogicality, unreasonableness, irrationality, irrationalities, illogicalities
7 Syllables
irresponsibility