Synonyms|189Antonyms|100|Broader|0Narrower|1Related|872
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feckless
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fossilized
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free
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free burning
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free will
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futile
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impossible(adjective, useless)
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impotent
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impracticable
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impractical
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inadequate
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incapable
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incompetent
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ineffectual
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inefficacious
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inefficient
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lifeless
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lock
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malfunctioning
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medieval
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APASmart Define. (2015). operational thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/operational/thesaurus/antonyms
ChicagoSmart Define. 2015. "operational thesaurus" https://smartdefine.org/operational/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, operational thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/operational/thesaurus/antonyms>.
MLASmart Define. "operational thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/operational/thesaurus/antonyms>