Insanity1. (n.) The state of being insane; unsoundness or derangement of mind; madness; lunacy.
2. (n.) Such a mental condition, as, either from the existence of delusions, or from incapacity to distinguish between right and wrong, with regard to any matter under action, does away with individual responsibility.
Thesaurus Entries
aberration, absurdity, alienation, amentia, arrested development, asininity, backwardness, battiness, blithering idiocy, brain disease, brainlessness, buffoonery, clownishness, crack-up, crackpottedness, crankiness, craziness, cretinism, daffiness, delirium, delusion, dementia praecox, derangement, desipience, distraction, dotage, dottiness, eccentricity, emotional disorder, emotional instability, fatuity, fatuousness, folly, foolery, foolheadedness, foolishness, frenzy, frivolity, frivolousness, functional nervous disorder, giddiness, goofiness, half-wittedness, hallucination, hysteria, idiocy, idiotism, illusion, imbecility, impracticality, inanity, ineptitude, infantilism, insaneness, irrationality, irresponsibility, lunacy, madness, maladjustment, mania, manic-depressive psychosis, melancholia, mental defectiveness, mental deficiency, mental derangement, mental disorder, mental handicap, mental illness, mental retardation, mindlessness, mongolianism, mongolism, mongoloid idiocy, moronism, moronity, nervous breakdown, nervous disorder, neurosis, niaiserie, nonsense, nugacity, nuttiness, paranoia, personality disorder, preposterousness, problems in living, profound idiocy, psychoneurosis, psychopathy, psychosis, queerness, reaction, retardation, retardment, sappiness, schizophrenia, screwiness, senselessness, silliness, simple-wittedness, simplemindedness, simpleness, simplicity, social maladjustment, stupidity, subnormality, thoughtlessness, triflingness, triviality, unbalance, unreasonableness, wackiness, weirdness, witlessness, zaniness, zanyism