70 entries under adjective topic. ×

17
careful(false, loose, reckless, painstaking)
11
cautious(careful, attentive, reckless, responsible)
11
prudent(action, thought, wise, attentive)
9
mindful(quiet, aware, attentive, responsible)
9
scrupulous(loose, careful, sloppy, attentive)
8
attentive
8
guarded(verb, attentive, responsible)
7
painstaking(unconcerned, attentive, thorough, meticulous)
7
frugal
7
shy
6
thoughtful(happy, caring, attentive, superficial)
5
chary(careful, cautious)
5
concerned(attentive, responsible)
5
conscientious(careful, thorough)
5
meticulous(false, detailed, perfectionist)
5
overprotective
5
vigilant(indifferent, careful, watchful)
4
observant(alert, watchful, unobservant)
4
accurate(attentive, responsible)
4
circumspect(cautious, discreet)
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APASmart Define. (2016). careless thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/careless/thesaurus/antonyms
ChicagoSmart Define. 2016. "careless thesaurus" https://smartdefine.org/careless/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, careless thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/careless/thesaurus/antonyms>.
MLASmart Define. "careless thesaurus" 3 March 2016. Web. 25 September 2026. <https://smartdefine.org/careless/thesaurus/antonyms>