71 entries under adjective topic. ×

3
idiotic(reasonable, smart, happy, careless)
3
impolite(happy, careless, superficial, flippant)
3
mean(verb, happy, careless, superficial)
3
stupid(sharp, happy, careless, intelligent)
3
unkind(gentle, friendly)
3
unmannerly(happy, careless, superficial, flippant)
2
casual
2
discourteous(happy, careless, superficial, flippant)
2
flippant(happy, careless, superficial)
2
incautious(happy, careless, careful, superficial)
2
neglectful
2
obtuse(happy, careless, superficial, flippant)
2
reckless(reserved, cautious)
2
selfish
2
unmindful(happy, careless, superficial, flippant)
2
unwise(stupid, prudent, irresponsible)
1
rash(reasonable, happy, sensible, careless)
1
foolhardy(rash, impetuous)
1
half-baked
1
ignorant(happy, careless, superficial, flippant)
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APASmart Define. (2016). thoughtful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/thoughtful/thesaurus/antonyms
ChicagoSmart Define. 2016. "thoughtful thesaurus" https://smartdefine.org/thoughtful/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, thoughtful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/thoughtful/thesaurus/antonyms>.
MLASmart Define. "thoughtful thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/thoughtful/thesaurus/antonyms>