110 entries under placid topic. ×

1
humane(adjective, calm, kind, smooth, soft)
1
indurated(adjective, cool, blank, aloof, unemotional)
1
inexcitable(adjective, cool, blank, aloof, unemotional)
1
inexpressive(adjective, cool, blank, aloof, unemotional)
1
insensible(adjective, cool, indifferent, blank, aloof)
1
insusceptible(adjective, cool, blank, aloof, unemotional)
1
jejune(adjective, calm, kind, smooth, soft)
1
reticent(adjective, close, quiet, cool, gentle)
1
spiritless(adjective, calm, quiet, cool, kind)
1
taciturn(adjective, close, quiet, cool, gentle)
1
tame(adjective, calm, quiet, kind, smooth)
1
tender(adjective, calm, quiet, kind, smooth)
1
unfeeling(adjective, calm, cool, relaxed, detached)
1
uniform(adjective, calm, quiet, soft, gentle)
1
unimpressible(adjective, calm, cool, relaxed, casual)
1
unvarying(adjective, calm, quiet, soft, gentle)
1
wooden(adjective, cool, blank, aloof, unemotional)
0
dry(adjective, cool, blank, aloof, unemotional)
0
dull(adjective, calm, kind, smooth, soft)
0
forbearant(adjective, calm, kind, smooth, soft)
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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>