74 entries under serene topic. ×

3
staid(adjective, calm, relaxed, tranquil, easygoing)
3
together(adjective, calm, quiet, relaxed, casual)
2
inexcitable(adjective, cool, blank, aloof, unemotional)
2
poised(adjective, calm, mild, relaxed, casual)
2
possessed(adjective, calm, quiet, relaxed, tranquil)
2
self-possessed(adjective, calm, quiet, cool, mild)
2
spiritless(adjective, cool, blank, aloof, unemotional)
2
sure of oneself(expression, adjective, idiom, calm, relaxed)
2
temperate(adjective, calm, quiet, relaxed, tranquil)
1
clearheaded(adjective, calm, relaxed, tranquil, easygoing)
1
commonsensical(adjective, calm, relaxed, tranquil, easygoing)
1
disimpassioned(adjective, calm, cool, relaxed, steady)
1
indurated(adjective, cool, blank, aloof, unemotional)
1
inexpressive(adjective, cool, blank, aloof, unemotional)
1
insusceptible(adjective, cool, blank, aloof, unemotional)
1
keeping a stiff upper lip(expression, adjective, idiom, calm, relaxed)
1
levelheaded(adjective, calm, quiet, relaxed, casual)
1
not turn a hair(expression, adjective, idiom, calm, relaxed)
1
quieted(adjective, calm, relaxed, tranquil, easygoing)
1
repressed(adjective, calm, relaxed, tranquil, easygoing)
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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>