Synonyms|1.3kAntonyms|350|Broader|9Narrower|12Related|1.5k
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ill
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imperceptible
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impertinent
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impuissant
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inadequate
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inadequately
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inane
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inapposite
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incapable
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incidental
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incompetent
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incompetently
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incorporeal
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indistinguishable
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ineffective
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ineffectively
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ineffectually
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inept
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inessential
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inexpert
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APASmart Define. (2016). significant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/significant/thesaurus/antonyms
ChicagoSmart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, significant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/significant/thesaurus/antonyms>.
MLASmart Define. "significant thesaurus" 4 March 2016. Web. 24 September 2026. <https://smartdefine.org/significant/thesaurus/antonyms>