122 entries under casual topic. ×

8
blithe(adjective, feature, state, care, indifferent)
8
offhand(adjective, calm, cool, mild, careless)
8
placid(adjective, calm, quiet, cool, mild)
8
stolid(adjective, calm, quiet, cool, relaxed)
8
tranquil(adjective, feature, state, calm, quiet)
8
unworried(adjective, feature, state, care, indifferent)
7
phlegmatic(adjective, calm, quiet, cool, relaxed)
7
unmindful(adjective, careless, indifferent, sloppy)
6
blasé(adjective, calm, cool, relaxed, cold)
6
effortless(adjective, calm, cool, relaxed)
6
incurious(adjective, calm, cool, careless, relaxed)
6
thoughtless(adjective, feature, state, careless, indifferent)
6
unexcited(adjective, calm, quiet, cool, relaxed)
6
unfeeling(adjective, calm, cool, relaxed, indifferent)
5
irresponsible(adjective, feature, state, trait)
5
laid-back(adjective, feature, state, calm, cool)
4
glib(adjective, indifferent)
4
level-headed(adjective, calm, cool, steady)
4
lighthearted(adjective, feature, state, trait, cheerful)
4
mellow(adjective, calm, cool, relaxed, indifferent)
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APASmart Define. (2015). nonchalant thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/nonchalant/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonchalant thesaurus" https://smartdefine.org/nonchalant/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, nonchalant thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/nonchalant/thesaurus/synonyms>.
MLASmart Define. "nonchalant thesaurus" 9 December 2015. Web. 30 September 2026. <https://smartdefine.org/nonchalant/thesaurus/synonyms>