11
free and easy(expression, adjective, idiom, feature, state)
11
lukewarm(adjective, calm, dull, cool, relaxed)
10
devil-may-care(adjective, feature, state, keen, happy)
10
dispassionate(adjective, calm, cool, relaxed, indifferent)
10
heedless(adjective, feature, state, dull, indifferent)
10
lighthearted(adjective, feature, state, keen, happy)
10
untroubled(adjective, feature, state, calm, cool)
9
detached(adjective, calm, cool, relaxed, indifferent)
9
disinterested(adjective, calm, cool, relaxed, cold)
9
easy(adjective, feature, state, calm, cool)
9
serene(adjective, feature, state, calm, cool)
9
unemotional(adjective, calm, cool, relaxed, cold)
9
unworried(adjective, feature, state, care, indifferent)
8
aloof(adjective, calm, cool, relaxed, cold)
8
easy-going(adjective, feature, state, happy, care)
8
gay(adjective, feature, state, happy, trait)
8
impassive(adjective, calm, cool, relaxed, cold)
8
jaunty(adjective, feature, state, happy, relaxed)
8
laid-back(adjective, feature, state, calm, cool)
8
languid(adjective, feature, state, trait, lethargic)
11 years ago|16k views|share |citing 
APASmart Define. (2015). insouciant thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/insouciant/thesaurus/synonyms
ChicagoSmart Define. 2015. "insouciant thesaurus" https://smartdefine.org/insouciant/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, insouciant thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/insouciant/thesaurus/synonyms>.
MLASmart Define. "insouciant thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/insouciant/thesaurus/synonyms>