Synonyms of insaneness

2 Syllables
folly, mania, frenzy, madness, phobia
3 Syllables
psychosis, delusion, hysteria, brainsickness, witlessness, craziness, dementia, dotage, illusion, lunacy, delirium, neurosis, distraction
4 Syllables
aberration, psychopathy, disturbance, inanity, senselessness, absurdity, derangement, unbalance
5 Syllables
preposterousness, alienation, hallucination
6 Syllables
unreasonableness, irrationality
7 Syllables
irresponsibility