108 entries under undisturbed topic. ×

4
aloof(adjective, calm, quiet, cool, moderate)
4
apathetic(adjective, calm, cool, relaxed, indifferent)
4
at peace(expression, adjective, calm, quiet, cool)
4
contented(adjective, feature, state, calm, quiet)
4
neutral(adjective, calm, quiet, cool, smooth)
4
reconciled(verb, adjective, calm, peaceful, tranquil)
3
lackadaisical(adjective, calm, cool, relaxed, indifferent)
3
negligent(adjective, feature, state, calm, cool)
3
stable(adjective, calm, quiet, smooth, soft)
2
careless(adjective, feature, state, calm, cool)
2
cold(adjective, calm, close, quiet, cool)
2
docile(adjective, calm, quiet, kind, smooth)
2
feckless(adjective, feature, state, indifferent, trait)
2
heedless(adjective, feature, state, indifferent, trait)
2
remote(adjective, shy, stable, peaceful, unconcerned)
1
stony(adjective, indifferent, unsympathetic, inattentive, uninterested)
1
uninterested(adjective, indifferent, unsympathetic, inattentive, nonchalant)
1
callous(adjective, calm, cool, indifferent, restrained)
1
cool as a cucumber(expression, adjective, idiom, calm, mild)
1
distant(adjective, close, quiet, gentle, mild)
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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>