Synonyms|36Antonyms|0|Broader|0Narrower|0Related|0
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bananas(adjective, sane)
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batty(adjective, sane)
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bonkers(adjective, sane)
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brainsick(adjective, sane)
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buggy(adjective, sane)
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cracked(adjective, sane)
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crackers(adjective, sane)
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crazy(adjective, sane)
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cuckoo(adjective, sane)
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daffy(adjective, sane)
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daft(adjective, sane)
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demented(adjective, sane)
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disordered(adjective, sane)
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distraught(adjective, sane)
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dotty(adjective, sane)
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fruity(adjective, sane)
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gaga(adjective, sane)
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insane(adjective, sane)
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loco(adjective, sane)
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loony(adjective, sane)
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ChicagoSmart Define. 2011. "off one's head thesaurus" https://smartdefine.org/off___one%27s_head/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2011, off one's head thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/off___one%27s_head/thesaurus/synonyms>.
MLASmart Define. "off one's head thesaurus" 7 May 2011. Web. 21 September 2026. <https://smartdefine.org/off___one%27s_head/thesaurus/synonyms>