Synonyms|798Antonyms|358|Broader|11Narrower|16Related|2.3k
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ill humour
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ill service
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ill turn
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ill will
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immaterial
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impertinent
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impossible
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impotent(adjective, bad, awkward, useless)
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impracticable
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improper(adjective, bad, awkward, useless)
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in excess(expression, reasonable)
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inactive
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inane
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inapposite
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inapt
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inauspicious
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incapable(adjective, bad, awkward, useless)
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incongruous
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inconsequential
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inconstant
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APASmart Define. (2016). useful thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/useful/thesaurus/antonyms
ChicagoSmart Define. 2016. "useful thesaurus" https://smartdefine.org/useful/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, useful thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/useful/thesaurus/antonyms>.
MLASmart Define. "useful thesaurus" 5 January 2016. Web. 26 September 2026. <https://smartdefine.org/useful/thesaurus/antonyms>