74 entries under serene topic. ×

1
reticent(adjective, cool, blank, aloof, unemotional)
1
sedate(adjective, calm, cool, relaxed, steady)
1
self-assured(adjective, calm, relaxed, tranquil, easygoing)
1
self-contained(adjective, cool, blank, aloof, unemotional)
1
sensible(adjective, calm, relaxed, tranquil, easygoing)
1
serious(adjective, calm, relaxed, tranquil, easygoing)
1
soothed(adjective, calm, relaxed, tranquil, easygoing)
1
suppressed(adjective, calm, relaxed, tranquil, easygoing)
1
taciturn(adjective, cool, blank, aloof, unemotional)
1
unimpressible(adjective, calm, cool, relaxed, casual)
1
wooden(adjective, cool, blank, aloof, unemotional)
0
calmed(adjective, calm, relaxed, tranquil, easygoing)
0
cool as cucumber(expression, adjective, idiom, calm, cool)
0
matter of fact(expression, idiom, placid, taciturn)
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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>