544 entries under adjective topic. ×

3
tolerant(feature, state, calm, reasonable)
3
tractable(calm, moderate, tender, informal)
3
unflustered(calm, cool, steady, peaceful)
3
warm(calm, kind, smooth, soft)
2
Arcadian
2
alleviated
2
assured(calm, quiet, cool, relaxed)
2
at a standstill(expression, idiom, quiet, cool)
2
balanced(calm, soft, reasonable, gentle)
2
benign(calm, moderate, tender, informal)
2
breezy(feature, state, mild, relaxed)
2
bucolic(calm, quiet, cool, smooth)
2
civil(quiet, cool, kind, gentle)
2
commodious(calm, quiet, light, smooth)
2
complaisant(calm, kind, smooth, soft)
2
conciliatory(easygoing, compliant, soothing, appeasing)
2
cool as cucumber(expression, idiom, calm, quiet)
2
coolheaded(calm, quiet, relaxed, casual)
2
dead
2
dormant
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APASmart Define. (2016). tranquil thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/tranquil/thesaurus/synonyms
ChicagoSmart Define. 2016. "tranquil thesaurus" https://smartdefine.org/tranquil/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, tranquil thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/tranquil/thesaurus/synonyms>.
MLASmart Define. "tranquil thesaurus" 3 March 2016. Web. 25 September 2026. <https://smartdefine.org/tranquil/thesaurus/synonyms>