Synonyms|40Antonyms|19|Broader|0Narrower|0Related|0
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absent-minded(adjective, quiet, careless)
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careless(adjective, quiet)
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heedless(adjective, quiet, careless)
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ignorant(adjective, quiet, careless)
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inattentive(adjective, quiet, careless)
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incautious(adjective, quiet, careless)
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indifferent(adjective, quiet, careless)
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indiscreet(adjective, quiet, careless)
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negligent(adjective, quiet, careless)
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quiet(adjective, careless)
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rash(adjective, quiet, careless)
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thoughtless(adjective, quiet, careless)
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unafraid(adjective, quiet, careless)
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unaware(adjective, quiet, careless)
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uncareful(adjective, quiet, careless)
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uninformed(adjective, quiet, careless)
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unmindful(adjective, quiet, careless)
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unobservant(adjective, quiet, careless)
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unworried(adjective, quiet, careless)
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APASmart Define. (2015). be up on thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/be_up_on/thesaurus/antonyms
ChicagoSmart Define. 2015. "be up on thesaurus" https://smartdefine.org/be_up_on/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, be up on thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/be_up_on/thesaurus/antonyms>.
MLASmart Define. "be up on thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/be_up_on/thesaurus/antonyms>