15
detached(adjective, calm, quiet, cool, relaxed)
15
worry-free(adjective, feature, state, trait)
15
negligent(adjective, feature, state, calm, cool)
14
careless(adjective, feature, state, calm, cool)
14
happy-go-lucky(adjective, feature, state, calm, care)
12
cold(adjective, calm, cool, temper, relaxed)
12
devil-may-care(adjective, feature, state, care, mild)
12
heedless(adjective, feature, state, careless, indifferent)
12
imperturbable(adjective, calm, cool, relaxed, steady)
12
lackadaisical(adjective, calm, cool, temper, relaxed)
12
listless(adjective, calm, cool, temper, relaxed)
12
smooth(adjective, calm, cool, relaxed, casual)
12
unflappable(adjective, calm, cool, relaxed, steady)
12
untroubled(adjective, feature, state, calm, cool)
10
carefree(adjective, feature, state, calm, care)
10
cold-blooded(adjective, cool, temper, cold, negative)
10
collected(adjective, calm, cool, mild, relaxed)
10
confident
10
free and easy(expression, adjective, idiom, feature, state)
10
half-hearted(adjective, temper, cold, indifferent, negative)
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APASmart Define. (2015). nonchalant thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/nonchalant/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonchalant thesaurus" https://smartdefine.org/nonchalant/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, nonchalant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/nonchalant/thesaurus/synonyms>.
MLASmart Define. "nonchalant thesaurus" 9 December 2015. Web. 23 September 2026. <https://smartdefine.org/nonchalant/thesaurus/synonyms>