65 entries under calm topic. ×

30
dull(verb, adjective, quiet, simple)
30
silent(adjective, close, quiet, soft)
27
speechless(adjective, close, quiet, beat)
24
mute(adjective, dull, close, quiet)
18
inarticulate(adjective, quiet, humble, speak)
16
unrequited(adjective, quiet, humble, shy)
15
tongue-tied(adjective, quiet, humble, speak)
14
taciturn(adjective, close, quiet, soft)
14
wordless(adjective, quiet, humble, speak)
12
quiet(verb, adjective, dull, close)
12
pigeon-livered(adjective, quiet, humble, shy)
11
humble(adjective, quiet, shy, silent)
9
meek(adjective, quiet, humble, shy)
7
unresponsive(adjective, quiet, humble, shy)
5
acquiescent(adjective, quiet, humble, shy)
5
answerless(adjective, quiet, humble, shy)
5
can't say boo to a goose(adjective, quiet, humble, shy)
5
lamblike(adjective, quiet, humble, shy)
5
silence(verb, dull, quiet, suppress)
5
still(verb, adjective, adverb, dull)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>