128 entries under unruffled topic. ×

1
flowing(adjective, calm, quiet, light, smooth)
1
fluent(adjective, calm, quiet, light, smooth)
1
forgoing(adjective, calm, quiet, reasonable, sensible)
1
forthright(adjective, calm, quiet, light, smooth)
1
hard-boiled(adjective, calm, sensible, dark, restrained)
1
in clover(expression, adjective, calm, quiet, light)
1
inhibited(adjective, calm, close, quiet, gentle)
1
keeping a stiff upper lip(expression, adjective, idiom, calm, relaxed)
1
low-key(adjective, calm, quiet, cool, smooth)
1
no-nonsense(adjective, calm, quiet, cool, reasonable)
1
not turn a hair(expression, adjective, idiom, calm, relaxed)
1
peaceful dull(expression, calm, quiet, reasonable, dark)
1
prosperous(adjective, calm, quiet, light, smooth)
1
quieted(adjective, calm, relaxed, tranquil, easygoing)
1
repressed(adjective, calm, relaxed, tranquil, easygoing)
1
running(adjective, calm, quiet, light, smooth)
1
severe(adjective, calm, quiet, reasonable, sensible)
1
slow(adjective, calm, quiet, light, cool)
1
soothed(adjective, calm, secure, soft, pleasant)
1
sound(adjective, calm, quiet, reasonable, firm)
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APASmart Define. (2015). serene thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/serene/thesaurus/synonyms
ChicagoSmart Define. 2015. "serene thesaurus" https://smartdefine.org/serene/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, serene thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/serene/thesaurus/synonyms>.
MLASmart Define. "serene thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/serene/thesaurus/synonyms>