Synonyms|81Antonyms|0|Broader|0Narrower|0Related|5
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mad as a meat axe(expression, crazy, mad, insane)
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madding(adjective, crazy, mad, odd, insane)
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madman(adjective, crazy, mad, odd, insane)
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meshugah(adjective, slang, crazy, mad)
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narly(adjective, slang, crazy, mad)
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nonsensical(adjective, crazy, mad, odd, insane)
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not right in the head(expression, crazy, mad, insane)
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nothing upstairs(expression, crazy, mad, insane)
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nuts(adjective, slang, crazy, mad)
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nutty(adjective, slang, crazy, mad)
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nutty as a fruitcake(expression, crazy, mad, insane)
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odd(adjective, crazy, mad, insane)
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off-the-wall(adjective, crazy, mad, odd, insane)
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off one's block(expression, crazy, mad, insane)
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off one's head(adjective, crazy, mad, odd, insane)
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off one's onion(expression, crazy, mad, insane)
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off one's rocker(expression, crazy, mad, insane)
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off one's trolley(expression, crazy, mad, insane)
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off the air(expression, crazy, mad, insane)
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one short of a dozen(expression, crazy, mad, insane)
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APASmart Define. (2013). craziest thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/craziest/thesaurus/synonyms
ChicagoSmart Define. 2013. "craziest thesaurus" https://smartdefine.org/craziest/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2013, craziest thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/craziest/thesaurus/synonyms>.
MLASmart Define. "craziest thesaurus" 17 May 2013. Web. 23 September 2026. <https://smartdefine.org/craziest/thesaurus/synonyms>