106 entries under foolish topic. ×

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foolhardy(silly, unwise)
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groundless(unreasonable, illogical)
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half-baked(simple, silly, unsound, unwise)
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ill-conceived(silly, unwise)
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impracticable(silly, unwise)
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imprudent(silly, thoughtless, unwise, impetuous)
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inappropriate(silly, unwise)
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incoherent(unreasonable, illogical)
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injudicious(unreasonable, illogical)
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invalid(unreasonable, illogical)
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irresponsible(silly, thoughtless, unwise, impetuous)
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out of all reason(expression, idiom, silly, unwise)
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puerile(silly, unwise)
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quixotic(happy, silly, unwise, fortunate)
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raving(unreasonable, illogical)
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reasonless(unreasonable, illogical)
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short-sighted(silly, unwise)
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sophistic(unreasonable, illogical)
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specious(unreasonable, illogical)
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unfounded(unreasonable, illogical)
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APASmart Define. (2015). flaky thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/flaky/thesaurus/synonyms
ChicagoSmart Define. 2015. "flaky thesaurus" https://smartdefine.org/flaky/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, flaky thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/flaky/thesaurus/synonyms>.
MLASmart Define. "flaky thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/flaky/thesaurus/synonyms>