2
protective
2
ready(adjective, attentive, responsible)
2
rigorous
2
safe
2
shrewd
2
sure
2
suspicious
2
too-careful
1
anxious
1
blue(adjective, feeling, happiness)
1
cagey
1
calculating
1
caring(adjective, attitude)
1
cognitive(stupid, unreasonable)
1
cognizant
1
conscious(uncertain, doubtful, dubious)
1
delicate
1
desirous
1
eager
1
enthusiastic
10 years ago|5.4k views|share |citing 
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>