170 entries under tranquil topic. ×

10
unworried(adjective, feature, state, calm, quiet)
9
detached(adjective, calm, quiet, cool, moderate)
9
insouciant(adjective, feature, state, calm, cool)
9
phlegmatic(adjective, calm, quiet, cool, relaxed)
9
satisfied(adjective, feature, state, calm, quiet)
9
unagitated(adjective, calm, quiet, relaxed, restrained)
8
casual(adjective, feature, state, calm, cool)
8
clear(adjective, calm, peaceful, undisturbed)
8
content(verb, adjective, calm, quiet, light)
8
poised(adjective, calm, quiet, cool, moderate)
8
reposeful(adjective, quiet, cool, smooth, mild)
8
unexcited(adjective, calm, quiet, cool, reasonable)
7
fair(adjective, calm, clear, still, detached)
7
laid-back(adjective, feature, state, calm, quiet)
7
staid(adjective, calm, quiet, cool, reasonable)
7
stoical(adjective, calm, quiet, cool, gentle)
6
carefree(adjective, feature, state, calm, quiet)
6
level(adjective, calm, quiet, smooth, soft)
6
meek(adjective, calm, quiet, kind, smooth)
6
pastoral(adjective, calm, quiet, cool, 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>