5
at rest(expression, adjective, idiom, calm, quiet)
5
bland(adjective, calm, quiet, cool, kind)
5
bloodless(calm, quiet, friendly, peace, serene)
5
easy-going(adjective, feature, state, calm, quiet)
5
meek(adjective, calm, quiet, kind, smooth)
5
mellow(adjective, calm, quiet, kind, smooth)
5
neutral(adjective, calm, quiet, cool, smooth)
5
phlegmatic(adjective, calm, quiet, relaxed, still)
5
possessed(adjective, calm, quiet, relaxed, still)
5
regular(adjective, calm, quiet, smooth, soft)
5
reserved(adjective, calm, quiet, soft, reasonable)
5
stolid(adjective, calm, quiet, relaxed, casual)
5
unexcitable(adjective, calm, quiet, cool, smooth)
4
unconcerned(adjective, feature, state, calm, quiet)
4
amicable(adjective, calm, quiet, cool, smooth)
4
carefree(adjective, feature, state, calm, quiet)
4
casual(adjective, feature, state, calm, informal)
4
comforting(adjective, quiet, peaceful, soothing, conciliatory)
4
contented(adjective, feature, state, calm, quiet)
4
dignified(adjective, calm, cool)
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APASmart Define. (2016). tranquil thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/tranquil/thesaurus/synonyms
ChicagoSmart Define. 2016. "tranquil thesaurus" https://smartdefine.org/tranquil/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, tranquil thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/tranquil/thesaurus/synonyms>.
MLASmart Define. "tranquil thesaurus" 3 March 2016. Web. 22 September 2026. <https://smartdefine.org/tranquil/thesaurus/synonyms>