95 entries under relaxed topic. ×

10
unexcitable(adjective, calm, quiet, cool, smooth)
9
unemotional(adjective, calm, quiet, cool, moderate)
8
indifferent(adjective, calm, cool, restrained)
8
phlegmatic(adjective, calm, quiet, cool)
8
temperate(adjective, calm, quiet, cool, smooth)
7
apathetic(adjective, calm, cool, casual)
7
moderate(adjective, calm, quiet, cool, gentle)
7
self-controlled(adjective, calm, quiet, cool)
7
staid(adjective, calm, cool, firm, sensible)
7
stolid(adjective, calm, quiet, cool)
7
unexcited(adjective, calm, quiet, cool, moderate)
7
unmoved(adjective, calm, quiet, cool, moderate)
6
poised(adjective, calm, quiet, cool, moderate)
6
still(adjective, calm, quiet, cool, moderate)
5
aloof(adjective, calm, quiet, cool, moderate)
5
easygoing(adjective, calm, quiet, cool, mild)
5
philosophical(adjective, calm, quiet, gentle)
4
levelheaded(adjective, calm, quiet, cool, moderate)
4
restful(adjective, calm, quiet, cool, moderate)
4
smooth(adjective, calm, quiet, cool)
11 years ago|10k views|share |citing 
APASmart Define. (2015). imperturbable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/imperturbable/thesaurus/synonyms
ChicagoSmart Define. 2015. "imperturbable thesaurus" https://smartdefine.org/imperturbable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, imperturbable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/imperturbable/thesaurus/synonyms>.
MLASmart Define. "imperturbable thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/imperturbable/thesaurus/synonyms>