Synonyms|528Antonyms|171|Broader|5Narrower|1Related|1.3k
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haughty
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ignorant
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impetuous
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impolitic
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improvident
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incognizant
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inducing oblivion(expression, idiom)
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injudicious
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innocent
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insouciant
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intrepid
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lightheaded
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lighthearted
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lionhearted
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listless
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manful
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meteoric
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napping
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nervy
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nescient
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APASmart Define. (2015). heedful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/heedful/thesaurus/antonyms
ChicagoSmart Define. 2015. "heedful thesaurus" https://smartdefine.org/heedful/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, heedful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/heedful/thesaurus/antonyms>.
MLASmart Define. "heedful thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/heedful/thesaurus/antonyms>