Synonyms|909Antonyms|156|Broader|7Narrower|0Related|1.8k

129 entries under silly topic. ×

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mentally strange(expression, foolish, unwise)
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out to lunch(expression, idiom, foolish, unwise)
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psycho(foolish, unwise)
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round the bend(expression, idiom, foolish, unwise)
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schizo(foolish, unwise)
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screw loose(expression, foolish, unwise)
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unglued(foolish, unwise)
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unpredictable(adjective, foolish, crazy, zany)
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unzipped(foolish, unwise)
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APASmart Define. (2015). preposterous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/preposterous/thesaurus/synonyms
ChicagoSmart Define. 2015. "preposterous thesaurus" https://smartdefine.org/preposterous/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, preposterous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/preposterous/thesaurus/synonyms>.
MLASmart Define. "preposterous thesaurus" 2 September 2015. Web. 22 September 2026. <https://smartdefine.org/preposterous/thesaurus/synonyms>