Synonyms|10Antonyms|0|Broader|0Narrower|0Related|0
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impossible
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improbable(adjective, impossible)
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incomprehensible(adjective, impossible)
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inconceivable(adjective, impossible)
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not feasible(expression, adjective, impossible)
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out of the question(expression, adjective, idiom, impossible)
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totally unlikely(expression, adjective, impossible)
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unacceptable(adjective, impossible)
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unimaginable(adjective, impossible)
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unthinkable(adjective, impossible)
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APASmart Define. (1970). highly unlikely thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/highly_unlikely/thesaurus/synonyms
ChicagoSmart Define. 1970. "highly unlikely thesaurus" https://smartdefine.org/highly_unlikely/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 1970, highly unlikely thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/highly_unlikely/thesaurus/synonyms>.
MLASmart Define. "highly unlikely thesaurus" 1 January 1970. Web. 20 September 2026. <https://smartdefine.org/highly_unlikely/thesaurus/synonyms>