635 entries under adjective topic. ×

6
reserved(calm, close, quiet, cool)
6
resting(calm, peaceful, tranquil, undisturbed)
6
silent(calm, quiet, smooth, gentle)
6
unconcerned(feature, state, calm, quiet)
6
unemotional(calm, quiet, cool, moderate)
6
unhurried(feature, state, calm, quiet)
6
unmoved(calm, quiet, cool, moderate)
5
at ease(expression, calm, quiet, light)
5
complacent(calm, cool, secure, soft)
5
inactive(quiet, cool, smooth, mild)
5
indifferent(feature, state, calm, cool)
5
languid(feature, state, calm, quiet)
5
lucid(calm, quiet, reasonable, sensible)
5
motionless(calm, quiet, cool, smooth)
5
snug(calm, quiet, light, secure)
5
solemn(calm, quiet, cool, reasonable)
5
soothing(calm, quiet, cool, smooth)
4
aloof(calm, quiet, cool, moderate)
4
apathetic(calm, cool, relaxed, indifferent)
4
at peace(expression, calm, quiet, cool)
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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>