130 entries under silly topic. ×

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mental(foolish, unwise)
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mentally strange(expression, foolish, unwise)
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moonstruck(foolish, unwise)
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nutty as fruitcake(expression, idiom, foolish, unwise)
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of unsound mind(expression, idiom, foolish, unwise)
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off the wall(expression, adjective, idiom, crazy)
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out of all reason(expression, idiom, foolish, unwise)
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out to lunch(expression, idiom, foolish, unwise)
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outrageous(foolish, ridiculous, absurd, unwise)
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peculiar(foolish, unwise)
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potty(foolish, unwise)
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psycho(foolish, unwise)
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puerile(foolish, unwise)
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quixotic(foolish, unwise)
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rash(crazy, thoughtless, unwise, wacky)
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reckless(crazy, thoughtless, unwise, wacky)
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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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strange(foolish, unwise, wacky)
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APASmart Define. (2015). zany thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/zany/thesaurus/synonyms
ChicagoSmart Define. 2015. "zany thesaurus" https://smartdefine.org/zany/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, zany thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/zany/thesaurus/synonyms>.
MLASmart Define. "zany thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/zany/thesaurus/synonyms>