128 entries under unruffled topic. ×

17
easy(adjective, feature, state, calm, quiet)
17
unflappable(adjective, calm, quiet, cool, moderate)
16
mild(adjective, feature, state, calm, quiet)
16
smooth(adjective, calm, quiet, light, cool)
14
equable(adjective, calm, quiet, cool, kind)
14
gentle(adjective, calm, quiet, light, cool)
13
impassive(adjective, calm, quiet, cool, moderate)
11
self-controlled(adjective, calm, close, quiet, gentle)
11
sober(adjective, calm, dull, quiet, cool)
10
moderate(adjective, calm, quiet, light, cool)
10
temperate(adjective, calm, quiet, light, cool)
10
unworried(adjective, feature, state, calm, quiet)
9
detached(adjective, calm, quiet, cool, moderate)
9
level-headed(adjective, calm, cool, smooth, steady)
9
phlegmatic(adjective, calm, quiet, cool, relaxed)
9
satisfied(adjective, feature, state, calm, quiet)
9
unagitated(adjective, calm, quiet, relaxed, restrained)
8
casual(adjective, feature, state, calm, cool)
8
content(verb, adjective, calm, quiet, light)
8
poised(adjective, calm, quiet, cool, moderate)
11 years ago|30k views|share |citing 
APASmart Define. (2015). serene thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/serene/thesaurus/synonyms
ChicagoSmart Define. 2015. "serene thesaurus" https://smartdefine.org/serene/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, serene thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/serene/thesaurus/synonyms>.
MLASmart Define. "serene thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/serene/thesaurus/synonyms>