Synonyms|42Antonyms|19|Broader|0Narrower|0Related|1
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unheard of(expression, adjective, belief, impossible, inconceivable)
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untenable(adjective, absurd, unbelievable, implausible, preposterous)
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APASmart Define. (2013). insupposable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/insupposable/thesaurus/synonyms
ChicagoSmart Define. 2013. "insupposable thesaurus" https://smartdefine.org/insupposable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2013, insupposable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/insupposable/thesaurus/synonyms>.
MLASmart Define. "insupposable thesaurus" 18 May 2013. Web. 25 September 2026. <https://smartdefine.org/insupposable/thesaurus/synonyms>