168 entries under cool topic. ×

1
trained(adjective, calm, quiet, soft)
1
unfeeling(adjective, calm, relaxed, casual)
1
unimpressed(adjective, quiet, moderate, gentle)
1
unimpressible(adjective, calm, relaxed, casual)
1
warmhearted(adjective, calm, quiet, soft)
1
waveless(adjective, quiet, smooth, mild)
1
wooden(adjective, dull, quiet, flat)
0
breathless(adjective, quiet, smooth, mild)
0
breezeless(adjective, quiet, smooth, mild)
0
bucolic(adjective, quiet, smooth, mild)
0
callous(adjective, dull, quiet, flat)
0
airy(adjective, calm, relaxed, casual)
0
blase(calm, relaxed, casual, offhand)
0
careless(adjective, calm, relaxed, casual)
0
cold sober(expression, calm, dignified)
0
decorous(calm, dignified)
0
earnest(calm, dignified)
0
effortless(adjective, calm, relaxed, casual)
0
incurious(adjective, calm, relaxed, casual)
0
loose(adjective, calm, relaxed, casual)
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APASmart Define. (2016). placid thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/placid/thesaurus/synonyms
ChicagoSmart Define. 2016. "placid thesaurus" https://smartdefine.org/placid/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, placid thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/placid/thesaurus/synonyms>.
MLASmart Define. "placid thesaurus" 29 February 2016. Web. 26 September 2026. <https://smartdefine.org/placid/thesaurus/synonyms>