15
prudent(adjective, reasonable, careless, imprudent)
13
kind(noun, adjective, mean, hard, reasonable)
13
thoughtful(adjective, contemplative, introspective)
8
considerate(adjective, mean, hard, reasonable, prudent)
8
heedful
7
attentive(adjective, reasonable, prudent)
7
charitable
7
smart
6
alert
6
ruminative
5
brainstorm
5
careful(adjective, reasonable, false, loose, prudent)
4
cautious(adjective, reasonable, careless, careful, prudent)
4
contemplative
3
jealous
3
circumspect
3
civil
3
good
3
kind-hearted
3
kindhearted
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APASmart Define. (2016). thoughtless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/thoughtless/thesaurus/antonyms
ChicagoSmart Define. 2016. "thoughtless thesaurus" https://smartdefine.org/thoughtless/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, thoughtless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/thoughtless/thesaurus/antonyms>.
MLASmart Define. "thoughtless thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/thoughtless/thesaurus/antonyms>