14
carefree
12
worry-free
8
unconcerned(adjective, calm, cool, sympathetic)
6
casual
5
harsh
5
happy(adjective, calm, cool)
4
atrocious
4
peaceful(adjective, calm, cool)
4
uninterested
3
nonchalant(adjective, hard)
2
indifferent(adjective, friendly, unfeeling, uninterested)
2
brave
1
apathetic(adjective, sympathetic, uncaring, disinterested)
1
careless(adjective, attentive, responsible)
1
disinterested(adjective, calm, feeling, cool)
1
uninvolved(adjective, calm, cool, involved)
1
blase
1
complacent(adjective, contented)
1
detached
1
stoic(adjective, feeling)
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APASmart Define. (2016). concerned thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/concerned/thesaurus/antonyms
ChicagoSmart Define. 2016. "concerned thesaurus" https://smartdefine.org/concerned/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, concerned thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/concerned/thesaurus/antonyms>.
MLASmart Define. "concerned thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/concerned/thesaurus/antonyms>