mind, unsound mind, abnormal mind; derangement, unsoundness; psychosis;
neurosis; cognitive disorder; affective disorder†.
insanity, lunacy; madness &c 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.] &c
(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 &c (imbecility) 499.
V. be insane &c adj.. become insane &c 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 &c (be imbecile) 499; have a
screw loose &c n., have a devil; avoir le diable au corps [Fr.]; lose
one's head &c (be uncertain) 475.
render mad, drive mad &c 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.].
Adj. 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 &c (uncertain)
475.
mad as a March hare, mad as a hatter; of unsound mind &c 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, &c 499.
Adv. like one possessed.
Phr. 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].