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

201 entries under adjective topic. ×

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insane
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irrealizable
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irreconcilable
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irresoluble(unfeasible, irreconcilable, irresolvable)
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irresolvable(unfeasible, irreconcilable, irresoluble)
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lofty(perfect, ideal, imaginary, supreme)
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mythic
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no-go
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no-way
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no-win
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peculiar
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unable
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unanswerable(intolerable, ungovernable)
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unbeatable(hopeless, insuperable, insurmountable)
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unconceivable
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uneasy(difficult, awkward, uncomfortable, trying)
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unnegotiable
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unthought of
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unusual
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unviable(unreasonable, unpractical, unfeasible, irresoluble)
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APASmart Define. (2016). impossible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impossible/thesaurus/synonyms
ChicagoSmart Define. 2016. "impossible thesaurus" https://smartdefine.org/impossible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, impossible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impossible/thesaurus/synonyms>.
MLASmart Define. "impossible thesaurus" 9 March 2016. Web. 23 September 2026. <https://smartdefine.org/impossible/thesaurus/synonyms>