72 entries under casual topic. ×

11
unflappable(adjective, calm, quiet, cool, smooth)
10
self-controlled(adjective, calm, close, quiet, gentle)
9
easy(adjective, calm, quiet, cool, weak)
7
mellow(adjective, calm, quiet, cool, weak)
7
relaxed(adjective, calm, quiet, cool, moderate)
7
unagitated(adjective, calm, quiet, relaxed)
6
nonchalant(adjective, calm, quiet, cool, mild)
6
phlegmatic(adjective, calm, quiet, cool, smooth)
6
poised(adjective, calm, quiet, cool, moderate)
5
level-headed(adjective, calm, smooth, steady)
5
patient(adjective, calm, quiet, cool, kind)
5
stolid(adjective, calm, dull, quiet, cool)
4
apathetic(adjective, calm, dull, quiet, cool)
4
complaisant(adjective, calm, kind, smooth, soft)
4
lenient(adjective, calm, quiet, weak, kind)
3
philosophical(adjective, calm, quiet, relaxed)
3
unemotional(adjective, calm, quiet, cool, moderate)
3
aloof(adjective, calm, close, quiet, cool)
3
coolheaded(adjective, calm, quiet, relaxed)
3
neutral(adjective, calm, quiet, cool, smooth)
10 years ago|22k views|share |citing 
APASmart Define. (2016). placid thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/placid/thesaurus/synonyms
ChicagoSmart Define. 2016. "placid thesaurus" https://smartdefine.org/placid/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, placid thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/placid/thesaurus/synonyms>.
MLASmart Define. "placid thesaurus" 29 February 2016. Web. 29 September 2026. <https://smartdefine.org/placid/thesaurus/synonyms>