Synonyms|519Antonyms|152|Broader|6Narrower|4Related|1k
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unsolvable
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unsuccessful
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unsuccessful person
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unsufferable
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untruthful
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unused
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unviable
0
unwarrantable
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unwise
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useless
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vacant
0
worthless(adjective, improper, impossible)
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APASmart Define. (2015). feasible thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/feasible/thesaurus/antonyms
ChicagoSmart Define. 2015. "feasible thesaurus" https://smartdefine.org/feasible/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, feasible thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/feasible/thesaurus/antonyms>.
MLASmart Define. "feasible thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/feasible/thesaurus/antonyms>