6
uncompassionate(adjective, calm, mean, hard, cool)
6
undisturbed(adjective, feature, state, calm, quiet)
6
unthinking(adjective, sharp, rude, careless, indifferent)
6
unworried(adjective, feature, state, calm, indifferent)
5
apathetical(adjective, temper, cold, negative, dead)
5
deaf(adjective, sharp, rude, indifferent, short)
5
emotionless(adjective, calm, cool, indifferent, unfriendly)
5
free and easy(expression, adjective, idiom, feature, state)
5
halfhearted(adjective, mean, hard, cool, temper)
5
hard-hearted(adjective, calm, indifferent, restrained, detached)
5
inactive(adjective, dull, quiet, cool, weak)
5
inert(adjective, cold, dead, apathy, passive)
5
irresponsible(adjective, feature, state, trait, careful)
5
laid-back(adjective, feature, state, calm, dull)
5
mindless(adjective, indifferent, careful, casual, happy-go-lucky)
5
passionless(adjective, calm, cool, indifferent, detached)
5
ruthless(adjective, insensitive)
5
supine(adjective, dull, weak, easy, slow)
5
tranquil(adjective, feature, state, calm, quiet)
5
unkind(adjective, mean, hard, cool, sharp)
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APASmart Define. (2015). unconcerned thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unconcerned/thesaurus/synonyms
ChicagoSmart Define. 2015. "unconcerned thesaurus" https://smartdefine.org/unconcerned/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unconcerned thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unconcerned/thesaurus/synonyms>.
MLASmart Define. "unconcerned thesaurus" 22 October 2015. Web. 25 September 2026. <https://smartdefine.org/unconcerned/thesaurus/synonyms>