Synonyms|903Antonyms|221|Broader|12Narrower|16Related|2.1k
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minute
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mistrustful
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observational
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observative(quiet, careless)
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on hand
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on to(expression, unfriendly, ignorant)
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paying attention
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perceptive
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pernickety
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plugged in(expression, unfriendly, ignorant)
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precise
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predesigned(careless, thoughtless)
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predeterminate(careless, thoughtless)
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prepense(careless, thoughtless)
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prescient
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prompt
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prying
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purposive(careless, thoughtless)
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questioning
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rapt
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APASmart Define. (2016). heedless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/heedless/thesaurus/antonyms
ChicagoSmart Define. 2016. "heedless thesaurus" https://smartdefine.org/heedless/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, heedless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/heedless/thesaurus/antonyms>.
MLASmart Define. "heedless thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/heedless/thesaurus/antonyms>