Synonyms|1.1kAntonyms|346|Broader|15Narrower|3Related|1.9k
1
nonchalant
1
oblivious
1
preoccupied
1
purposeless
1
rushed
1
ruthless
1
self-righteous(adjective, smug)
1
sudden
1
unadvised
1
uncalculated
1
unguarded(adjective, thoughtless, unwary)
1
unhelpful
1
unkindly
1
unperceptive
1
unrefined(adjective, happy, careless, superficial, flippant)
1
unserious(adjective, happy, careless, sober, superficial)
1
unstudied
1
unwary(adjective, thoughtless, heedless)
0
lax
0
low
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APASmart Define. (2016). thoughtful thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/thoughtful/thesaurus/antonyms
ChicagoSmart Define. 2016. "thoughtful thesaurus" https://smartdefine.org/thoughtful/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, thoughtful thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/thoughtful/thesaurus/antonyms>.
MLASmart Define. "thoughtful thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/thoughtful/thesaurus/antonyms>