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Synonyms of insane in English:


  • 1 she was declared insane
    mentally ill, mentally disordered, of unsound mind, certifiable;
    psychotic, schizophrenic;
    vulgar slang batshit
    [Antonyms] sane
  • 2 insane laughter
    maniacal, psychotic, crazed, hysterical
    [Antonyms] normal
  • 3 an insane suggestion
    impracticable, implausible, irrational, illogical
    informal crazy, mad, cockeyed, daft
    [Antonyms] sensible
  • 4 I just looked at next week's schedule, and now I'm completely insane
    mad, crazy;
    angry, furious, annoyed
    informal aggravated, foaming at the mouth, hot under the collar
    [Antonyms] calm, contented
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