Synonyms|607Antonyms|112|Broader|9Narrower|11Related|650

63 entries under expression topic. ×

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highly unlikely
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impossible action
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is impossible
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labor in vain(idiom, inutility)
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lash the waves(idiom, inutility)
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last straw(insufferable, unbearable)
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milk the ram(idiom, inutility)
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not acceptable
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not applicable(silly, impractical, unlikely, idealistic)
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not sensible(silly, impractical, unlikely, dreamy)
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not welcome
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on cloud nine(idiom, unlikely, dreamy, optimistic)
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open to suspicion(idiom, unbelief doubt)
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pie in the sky(idiom, ideal, imaginary, lofty)
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rings phony(unbelievable, implausible, improbable)
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run one hard(idiom, difficulty)
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seek after impossibilities(idiom, inutility)
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sow the sand(idiom, inutility)
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strive after impossibilities(idiom, inutility)
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too late(idiom, inutility)
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APASmart Define. (2016). impossible thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impossible/thesaurus/synonyms
ChicagoSmart Define. 2016. "impossible thesaurus" https://smartdefine.org/impossible/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, impossible thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impossible/thesaurus/synonyms>.
MLASmart Define. "impossible thesaurus" 9 March 2016. Web. 22 September 2026. <https://smartdefine.org/impossible/thesaurus/synonyms>