159 entries under cool topic. ×

5
solemn(adjective, calm, quiet, reasonable)
5
soothing(adjective, calm, quiet, smooth)
4
aloof(adjective, calm, quiet, moderate)
4
apathetic(adjective, calm, relaxed, indifferent)
4
at peace(expression, adjective, calm, quiet)
4
bucolic(adjective, calm, quiet, smooth)
4
cold-blooded(adjective, calm, detached, blank)
4
deliberate(adjective, calm, quiet, relaxed)
4
demure(adjective, calm, quiet, gentle)
4
dignified(adjective, calm)
4
equanimous(calm, unflappable)
4
grave(adjective, calm, quiet, reasonable)
4
hushed(adjective, calm, quiet, smooth)
4
laid back(verb, expression, adjective, phrasal verb, feature)
4
neutral(adjective, calm, quiet, smooth)
4
self-contained(adjective, close, quiet, gentle)
4
serious(adjective, calm, sensible, relaxed)
4
stolid(adjective, calm, quiet, relaxed)
4
together(adjective, calm, quiet, relaxed)
3
kind(adjective, calm, quiet, smooth)
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APASmart Define. (2015). serene thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/serene/thesaurus/synonyms
ChicagoSmart Define. 2015. "serene thesaurus" https://smartdefine.org/serene/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, serene thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/serene/thesaurus/synonyms>.
MLASmart Define. "serene thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/serene/thesaurus/synonyms>