159 entries under cool topic. ×

9
phlegmatic(adjective, calm, quiet, relaxed)
9
satisfied(adjective, feature, state, calm, quiet)
8
casual(adjective, feature, state, calm)
8
poised(adjective, calm, quiet, moderate)
8
reposeful(adjective, quiet, smooth, mild)
8
unexcited(adjective, calm, quiet, reasonable)
7
laid-back(adjective, feature, state, calm, quiet)
7
staid(adjective, calm, quiet, reasonable)
7
stoical(adjective, calm, quiet, gentle)
6
airy(adjective, feature, state, calm)
6
light(adjective, feature, state, calm, quiet)
6
pastoral(adjective, calm, quiet, smooth)
6
reserved(adjective, calm, close, quiet)
6
unconcerned(adjective, feature, state, calm, quiet)
6
unemotional(adjective, calm, quiet, moderate)
6
unmoved(adjective, calm, quiet, moderate)
5
complacent(adjective, calm, secure, soft)
5
inactive(adjective, quiet, smooth, mild)
5
indifferent(adjective, feature, state, calm)
5
motionless(adjective, calm, quiet, smooth)
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APASmart Define. (2015). serene thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/serene/thesaurus/synonyms
ChicagoSmart Define. 2015. "serene thesaurus" https://smartdefine.org/serene/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, serene thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/serene/thesaurus/synonyms>.
MLASmart Define. "serene thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/serene/thesaurus/synonyms>