130 entries under foolish topic. ×

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unglued(silly, unwise)
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ungovernable(adjective, crazy, irrational, outrageous)
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unhinged(silly, unwise)
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unrestrained(adjective, rough, crazy, irrational)
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unruly(adjective, crazy, irrational, outrageous)
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unzipped(silly, unwise)
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uproarious(adjective, rough, crazy, irrational)
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wacky(silly, unwise)
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wayward(adjective, crazy, irrational, outrageous)
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zany(silly, unwise)
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APASmart Define. (2016). impracticable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impracticable/thesaurus/synonyms
ChicagoSmart Define. 2016. "impracticable thesaurus" https://smartdefine.org/impracticable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, impracticable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impracticable/thesaurus/synonyms>.
MLASmart Define. "impracticable thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/impracticable/thesaurus/synonyms>