128 entries under cool topic. ×

14
careless(adjective, feature, state, calm)
12
cold(adjective, calm, temper, relaxed)
12
imperturbable(adjective, calm, relaxed, steady)
12
lackadaisical(adjective, calm, temper, relaxed)
12
listless(adjective, calm, temper, relaxed)
12
smooth(adjective, calm, relaxed, casual)
12
unflappable(adjective, calm, relaxed, steady)
12
untroubled(adjective, feature, state, calm)
10
cold-blooded(adjective, temper, cold, negative)
10
collected(adjective, calm, mild, relaxed)
10
neutral(adjective, calm, relaxed, cold)
10
unperturbed(adjective, calm, quiet, relaxed)
10
unruffled(adjective, calm, relaxed, indifferent)
9
airy(adjective, nature, feature, state, calm)
9
light(adjective, feature, state, calm)
8
offhand(adjective, calm, mild, careless)
8
placid(adjective, calm, quiet, mild)
8
stolid(adjective, calm, quiet, relaxed)
8
tranquil(adjective, feature, state, calm, quiet)
8
unexcitable(adjective, calm, steady, blank)
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APASmart Define. (2015). nonchalant thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/nonchalant/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonchalant thesaurus" https://smartdefine.org/nonchalant/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, nonchalant thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/nonchalant/thesaurus/synonyms>.
MLASmart Define. "nonchalant thesaurus" 9 December 2015. Web. 25 September 2026. <https://smartdefine.org/nonchalant/thesaurus/synonyms>