96 entries under foolish topic. ×

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cockamamie(unreasonable, illogical)
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disconnected(unreasonable, illogical)
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disjointed(unreasonable, illogical)
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eccentric(silly, unstable, disturbed, unhinged)
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fantastic
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foolhardy(fantastic, rash, risky)
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frenetic
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hasty(rash, risky)
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improvident(rash, risky)
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incoherent(unreasonable, illogical)
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inept(rash, risky)
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naive(rash, risky)
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off-the-wall(unreasonable, illogical)
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short-sighted(rash, risky)
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undesirable(rash, risky, harmful, injurious)
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unfortunate(rash, risky)
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APASmart Define. (2015). unsound thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unsound/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsound thesaurus" https://smartdefine.org/unsound/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unsound thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unsound/thesaurus/synonyms>.
MLASmart Define. "unsound thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/unsound/thesaurus/synonyms>