122 entries under casual topic. ×

4
self-controlled(adjective, calm, quiet, relaxed)
3
imprudent(adjective, reckless, happy-go-lucky, slapdash)
3
jaunty(adjective, feature, state, trait, cheerful)
3
lax(adjective, feature, state, careless, indifferent)
3
neglectful(adjective, calm, cool, careless, relaxed)
3
together(adjective, calm, quiet, relaxed)
3
trifling(adjective, calm, cool, relaxed)
3
undemanding(adjective, feature, state, calm, mild)
2
breezy(adjective, feature, state, calm, cool)
2
buoyant(adjective, feature, state, trait, cheerful)
2
complacent(adjective, calm, cool, mild, relaxed)
2
cavalier(adjective, careless, indifferent, easygoing)
2
cursory(adjective, cool, careless, relaxed, indifferent)
2
disregardful(adjective, careless, indifferent, thoughtless)
2
inconsiderate(adjective, careless, indifferent, unconcerned)
2
laid back(expression, adjective, feature, state, calm)
2
loose(adjective, calm, cool, relaxed, indifferent)
2
mindless(happy-go-lucky, slapdash)
2
poised(adjective, calm, mild, relaxed)
2
quiet(adjective, feature, state, calm, cool)
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APASmart Define. (2015). nonchalant thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/nonchalant/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonchalant thesaurus" https://smartdefine.org/nonchalant/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, nonchalant thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/nonchalant/thesaurus/synonyms>.
MLASmart Define. "nonchalant thesaurus" 9 December 2015. Web. 29 September 2026. <https://smartdefine.org/nonchalant/thesaurus/synonyms>