Roget's Thesaurus

#503. Insanity

Nouns

disordered reason, disordered intellect; diseased mind, unsound mind, abnormal mind; derangement, unsoundness; psychosis; neurosis; cognitive disorder; affective disorder. insanity, lunacy; madness etc. adj.; mania, rabies, furor, mental alienation, aberration; paranoia, schizophrenia; dementation, dementia, demency; phrenitis, phrensy, frenzy, raving, incoherence, wandering, delirium, calenture of the brain; delusion, hallucination; lycanthropy; brain storm. vertigo, dizziness, swimming; sunstroke, coup de soleil [Fr.], siriasis. fanaticism, infatuation, craze; oddity, eccentricity, twist, monomania (caprice) 608; kleptodipsomania; hypochondriasis [Med.] etc. (low spirits) 837; melancholia, depression, clinical depression, severe depression; hysteria; amentia. screw loose, tile loose, slate loose; bee in one's bonnet, rats in the upper story. dotage etc. (imbecility) 499.

Verbs

be insane etc. adj.. become insane etc. adj.; lose one's senses, lose one's reason, lose one's faculties, lose one's wits; go mad, run mad, lose one's marbles [Coll.], go crazy, go bonkers [Coll.], flip one's wig [Coll.], flip one's lid [Coll.], flip out [Coll.], flip one's bush [Coll.]. rave, dote, ramble, wander; drivel etc. (be imbecile) 499; have a screw loose etc. n., have a devil; avoir le diable au corps [Fr.]; lose one's head etc. (be uncertain) 475. render mad, drive mad etc. adj.; madden, dementate, addle the wits, addle the brain, derange the head, infatuate, befool; turn the brain, turn one's head; drive one nuts [Coll.].

Adjectives

insane, mad, lunatic, loony [Coll.]; crazy, crazed, aliene, non compos mentis; not right, cracked, touched; bereft of reason; all possessed, unhinged, unsettled in one's mind; insensate, reasonless, beside oneself, demented, daft; phrenzied, frenzied, frenetic; possessed, possessed with a devil; deranged, maddened, moonstruck; shatterpated; mad-brained, scatter brained, shatter brained, crackbrained; touched, tetched [Coll.]; off one's head. [behavior suggesting insanity] maniacal; delirious, lightheaded, incoherent, rambling, doting, wandering; frantic, raving, stark staring mad, stark raving mad, wild-eyed, berserk; delusional, hallucinatory. [behavior somewhat resembling insanity] corybantic, dithyrambic; rabid, giddy, vertiginous, wild; haggard, mazed; flighty; distracted, distraught; depressed; agitated, hyped up; bewildered etc. (uncertain) 475. mad as a March hare, mad as a hatter;of unsound mind etc. n.; touched in one's head, wrong in one's head, not right in one's head, not in one's right mind, not right in one's wits, upper story; out of one's mind, out of one's wits, out of one's skull [Coll.], far gone, out of one's senses, out of one's wits; not in one's right mind. fanatical, infatuated, odd, eccentric; hypped, hyppish; spaced out [Coll.]. imbecile, silly, etc. 499.

Adverbs

like one possessed.

Phrases

the mind having lost its balance; the reason under a cloud; tet exaltee [Fr.], tet montee [Fr.]; ira furor brevis est [Lat.]; omnes stultos insanire [Lat.] [Horace].