170 entries under tranquil topic. ×

4
sensible(adjective, calm, happy, firm, solid)
4
serious(adjective, calm, cool, sensible, relaxed)
4
together(adjective, calm, quiet, cool, relaxed)
4
undemanding(adjective, feature, state, calm, quiet)
3
calmed(adjective, calm, happy, relaxed, welcome)
3
kind(adjective, calm, quiet, cool, smooth)
3
levelheaded(adjective, calm, quiet, cool, reasonable)
3
lifeless(adjective, calm, quiet, smooth)
3
possessed(adjective, calm, quiet, cool, easy)
3
relaxing(adjective, calm, secure, soft, pleasant)
3
stable(adjective, calm, quiet, smooth, soft)
3
tolerant(adjective, feature, state, calm, quiet)
3
unmoving(adjective, silent, motionless, immobile)
2
amiable(adjective, calm, quiet, cool, kind)
2
bland(adjective, calm, quiet, cool, kind)
2
complaisant(adjective, calm, kind, smooth, soft)
2
docile(adjective, calm, quiet, kind, smooth)
2
harmonious(adjective, calm, quiet, cool, smooth)
2
indulgent(adjective, calm, kind, soft, gentle)
2
inscrutable(adjective, quiet, cool, moderate, gentle)
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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>