635 entries under adjective topic. ×

10
limpid(verb, calm, clear, peaceful)
10
moderate(calm, quiet, light, cool)
10
peaceable(calm, quiet, kind, smooth)
10
pellucid(verb, calm, clear, peaceful)
10
steady(calm, quiet, cool, smooth)
10
temperate(calm, quiet, light, cool)
10
unexcitable(calm, quiet, cool, smooth)
10
unworried(feature, state, calm, quiet)
9
detached(calm, quiet, cool, moderate)
9
insouciant(feature, state, calm, cool)
9
level-headed(calm, cool, smooth, steady)
9
orderly(calm, quiet, smooth, gentle)
9
phlegmatic(calm, quiet, cool, relaxed)
9
satisfied(feature, state, calm, quiet)
9
unagitated(calm, quiet, relaxed, restrained)
8
casual(feature, state, calm, cool)
8
clear(calm, peaceful, tranquil, undisturbed)
8
content(verb, calm, quiet, light)
8
happy-go-lucky(feature, state, care, mild)
8
poised(calm, quiet, cool, moderate)
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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>