Synonyms|903Antonyms|221|Broader|12Narrower|16Related|2.1k
1
scrupulous
1
self-made
1
subtle
1
suspicious(careless, certain)
1
wakeful
1
wide-awake
1
wise(careless, foolish, unsound)
1
witting(uncertain, dubious)
1
zealous
0
able to recognize(expression, idiom, uncertain, doubtful, dubious)
0
absorbed
0
accurate
0
aforethought(careless, thoughtless)
0
alive
0
alive to(expression, uncertain, doubtful, dubious)
0
amiable
0
anxious
0
apperceptive(uncertain, doubtful, dubious)
0
appetent
0
apprehensive
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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>