544 entries under adjective topic. ×

4
free and easy(expression, idiom, feature, state)
4
friendly(calm, quiet, peaceful, easygoing)
4
happy-go-lucky(feature, state, mild, relaxed)
4
home(house, family, private, household)
4
homely(house, home, family, private)
4
idle
4
indifferent(feature, state, reasonable, sensible)
4
insouciant(feature, state, mild, relaxed)
4
laid-back(feature, state, calm, quiet)
4
lazy(calm, mild, relaxed, casual)
4
level(calm, quiet, smooth, soft)
4
light(feature, state, calm, quiet)
4
measured(calm, quiet, soft, reasonable)
4
muted(calm, quiet, smooth, soft)
4
philosophical(calm, quiet, gentle, relaxed)
4
serious(calm, cool, relaxed, easygoing)
4
solemn(calm, cool, dignified)
4
static(calm, quiet, smooth, silent)
4
stationary(calm, quiet, smooth, silent)
4
stilly
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APASmart Define. (2016). tranquil thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tranquil/thesaurus/synonyms
ChicagoSmart Define. 2016. "tranquil thesaurus" https://smartdefine.org/tranquil/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, tranquil thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tranquil/thesaurus/synonyms>.
MLASmart Define. "tranquil thesaurus" 3 March 2016. Web. 24 September 2026. <https://smartdefine.org/tranquil/thesaurus/synonyms>