Synonyms and Antonyms of insane
1 having or showing a very abnormal or sick state of mind only an insane person would intentionally jump off a skyscraper Synonyms of insane balmy, barmy [chiefly British], bats, batty, bedlam, bonkers, brainsick, bughouse [slang], certifiable, crackbrained, cracked, crackers, crackpot, cranky [dialect], crazed, crazy, cuckoo, daffy, daft, demented, deranged, fruity [slang], gaga, haywire, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, maniacal (also maniac), mental, meshuga (or meshugge also meshugah or meshuggah), moonstruck, non compos mentis, nuts, nutty, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish] Words Related to insane dotty, fey, loopy, off, potty [chiefly British], teched (or tetched), touched; aberrant, delirious, delusional, delusionary, disordered, disturbed, neurotic, obsessive-compulsive, paranoiac (also paranoic), paranoid (also paranoidal), schizoid, schizophrenic, sociopathic; eccentric, odd, oddball, pixilated (also pixillated), queer, strange; foolish, senseless, witless; irrational, unreasonable; amok (or amuck), ape, ballistic, bananas, berserk, nuclear; depressed; distracted, distraught, frantic, frenzied, haywire, hysterical (also hysteric), raving, wigged-out; fixated, monomaniac, monomaniacal, obsessed Phrases around the bend, off one's gourd, off one's head, off one's rocker, out of one's head (or mind), out to lunch [slang] Near Antonyms of insane clear, lucid, rational, reasonable; judicious, sensible, wise; healthy, normal, well-adjusted; unneurotic Antonyms of insane balanced, compos mentis, sane, sound, uncrazy
2 conceived or made without regard for reason or reality a completely insane plan to build an opera house in the middle of nowhere Synonyms of insane absurd, bizarre, crazy, fanciful, foolish, fantastic, nonsensical, preposterous, unreal, wildWords Related to insane implausible, inconceivable, incredible, unbelievable, unimaginable, unthinkable; extravagant, grotesque; bizarro, curious, eccentric, far-out, funny, kinky, kooky (also kookie), odd, outlandish, out-of-the-way, outré, peculiar, quaint, queer, queerish, quirky, screwy, strange, wacky (also whacky), way-out, weird; farcical, laughable, ludicrous, ridiculous; Alice-in-Wonderland, Kafkaesque, nightmarish; dreamlike, surrealAntonyms of insane realistic, reasonable
3 showing or marked by a lack of good sense or judgment an insane plan to blow all of their savings on lottery tickets Synonyms of insane absurd, asinine, balmy, brainless, bubbleheaded, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, fatuous, featherheaded, fool, half-baked, harebrained, half-witted, inept, foolish, jerky, kooky (also kookie), loony (also looney), lunatic, lunkheaded, mad, nonsensical, nutty, preposterous, sappy, screwball, senseless, silly, simpleminded, stupid, tomfool, unwise, wacky (also whacky), weak-minded, witless, zanyWords Related to insane airheaded, birdbrained, boobish, brain-dead, chowderheaded, chuckleheaded, clueless, dense, dim, dim-witted, doltish, dopey (also dopy), dorky [slang], dull, dumb, dunderheaded, empty-headed, fatuous, feebleminded, gormless [chiefly British], idiotic (also idiotical), imbecile (or imbecilic), knuckleheaded, lamebrain (or lamebrained), mindless, moronic, oafish, obtuse, opaque, pinheaded, simple, slow, slow-witted, soft, softheaded, thoughtless, thick, thickheaded, unintelligent, vacuous, witless; fallacious, illogical, invalid, irrational, nonrational, surd, unreasonable, unreasoning, unsound, weak; farcical, laughable, ludicrous, ridiculous; notional; buffoonish, clownish; ill-advised, unconsidered, unreasonedNear Antonyms of insane brainy, bright, clever, intelligent, smart; logical, rational, reasonable, valid; well-advisedAntonyms of insane judicious, prudent, sagacious, sage, sane, sapient, sensible, sound, wise
4 going beyond a normal or acceptable limit in degree or amount wanted an insane amount of money to paint our house Synonyms of insane baroque, devilish, exorbitant, extravagant, extreme, fancy, immoderate, inordinate, excessive, intolerable, lavish, overdue, overextravagant, overmuch, overweening, plethoric, steep, stiff, towering, unconscionable, undue, unmercifulWords Related to insane boundless, endless, immeasurable, infinite, limitless; unbearable, unjustifiable, unwarranted; improper, inappropriate, thick, unseemly; unrestrainedNear Antonyms of insane deficient, inadequate, insufficient; minimal, minimumAntonyms of insane middling, moderate, modest, reasonable, temperate
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