3
reasonable(adjective, calm, quiet, sound, easy)
3
self-contained
3
serious
3
solemn
3
together(adjective, calm, sound, sensible, composed)
3
unexcitable(adjective, calm, quiet, easy, mild)
3
uninterested(adjective, indifferent, unsympathetic, inattentive, nonchalant)
3
unvexed(adjective, calm, tranquil, unruffled)
2
aloof(adjective, calm, cool, relaxed, indifferent)
2
casual(adjective, calm, cool, relaxed, detached)
2
cold(adjective, calm, cool, relaxed, indifferent)
2
easy(adjective, calm, quiet, cool, mild)
2
equable
2
equanimous
2
grave
2
hushed(adjective, calm, quiet, easy, mild)
2
in control(expression, adjective, idiom, tranquil)
2
insouciant(adjective, calm, cool, relaxed, indifferent)
2
level-headed
2
levelheaded(calm, composed, poised)
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APASmart Define. (2015). unperturbed thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unperturbed/thesaurus/synonyms
ChicagoSmart Define. 2015. "unperturbed thesaurus" https://smartdefine.org/unperturbed/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unperturbed thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unperturbed/thesaurus/synonyms>.
MLASmart Define. "unperturbed thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/unperturbed/thesaurus/synonyms>