15
well-versed
14
careful(adjective, false, loose, reckless)
10
overprotective
9
cautious(adjective, careless, reckless)
7
mindful(adjective, quiet, careless, careful)
6
attentive(adjective, careless, careful)
6
heedful
6
meticulous(adjective, false, careless)
5
diligent(adjective, persevering)
5
assiduous
5
prudent
4
painstaking
3
conscientious
3
hardworking
3
ruminative
3
scrupulous(adjective, loose, careful, sloppy)
3
thoughtful(adjective, happy, careless, superficial, contemplative)
3
vigilant(adjective, careless, indifferent, careful, watchful)
3
wary(adjective, careless, certain)
2
chary
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APASmart Define. (2015). negligent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/negligent/thesaurus/antonyms
ChicagoSmart Define. 2015. "negligent thesaurus" https://smartdefine.org/negligent/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, negligent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/negligent/thesaurus/antonyms>.
MLASmart Define. "negligent thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/negligent/thesaurus/antonyms>