Synonyms|152Antonyms|36|Broader|0Narrower|0Related|298
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indefinite(adjective, careless, thoughtless)
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indeterminate(adjective, careless, thoughtless)
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involuntary
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natural
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neglected(adjective, forgotten)
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spontaneous(adjective, casual)
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thoughtless(adjective, careless)
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uncareful(adjective, careless, thoughtless)
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unintended
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unmethodical(adjective, careless, thoughtless)
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unmindful(adjective, careless, thoughtless)
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unpremeditated
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unstudied(adjective, forgotten)
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unsystematic(adjective, careless, thoughtless)
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unwilling
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will-less
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APASmart Define. (2015). prepense thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/prepense/thesaurus/antonyms
ChicagoSmart Define. 2015. "prepense thesaurus" https://smartdefine.org/prepense/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, prepense thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/prepense/thesaurus/antonyms>.
MLASmart Define. "prepense thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/prepense/thesaurus/antonyms>