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⇱ insane - WordReference.com English Thesaurus


insane

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UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ɪnˈseɪn/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ɪnˈseɪn/ ,USA pronunciation: respelling(in sān)


insane
WordReference English Thesaurus © 2026
Sense: Adjective: crazy
Synonyms:
crazy Collocations (informal), crazed, mad Collocations (UK), nutty (informal), loony (informal), nuts (slang), screwy (slang), loco (US, slang), wacko (US, slang), cuckoo (slang), bananas (slang), batty (informal), wacky Collocations (informal), crackers Collocations (UK, slang), psychotic, psycho (informal), lunatic, unbalanced, deranged, unhinged, out of your mind (informal), mad as a hatter, mad as a March hare (UK), round the bend (slang), bonkers (slang), nutty as a fruitcake (slang), off your rocker (slang), out of your gourd (slang), out to lunch (slang), not all there (informal), mentally unsound, of unsound mind, stark raving mad (UK, slang), non compos mentis, manic, psychopathic, mentally ill, schizophrenic, schizoid, schizo (informal), touched (informal), mentally unstable
Antonyms:
sane, sound Collocations, lucid, right-minded, sober Collocations, balanced Collocations, of sound mind, in your right mind
Sense: Adjective: foolish
Synonyms:
foolish Collocations, idiotic, stupid Collocations, daft Collocations, unwise, silly Collocations, crazy Collocations (informal), mad Collocations (UK), senseless
Antonyms:
rational Collocations, wise Collocations, sensible Collocations, judicious, reasonable Collocations, well-thought, well-advised, level-headed, logical, practical Collocations
Sense: Adjective: absurd
Synonyms:
absurd, crazy Collocations (informal), preposterous Collocations, ludicrous Collocations, bizarre Collocations, nonsensical, ridiculous Collocations, mad Collocations (UK)
Sense: Adjective: extreme
Synonyms:
extreme Collocations, exorbitant, excessive, inordinate, immoderate, over the top, OTT (UK, informal), stiff Collocations, steep Collocations, wild Collocations (informal), crazy Collocations (informal), unreasonable

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