25 entries under tight-lipped topic. ×

4
mute(adjective, close, quiet, soft, low)
3
silent(adjective, close, quiet, soft, low)
2
buttoned up(expression, adjective, close, quiet, soft)
2
clammed up(expression, adjective, close, quiet, soft)
2
quiet(adjective, close, soft, low, restrained)
1
closemouthed(adjective, quiet, still, shy, silent)
1
dumb(adjective, close, quiet, soft, low)
1
hushed(adjective, close, quiet, soft, low)
1
mum(adjective, quiet, restrained, still, silent)
1
muted(adjective, close, quiet, soft, low)
1
nonvocal(adjective, close, quiet, restrained, still)
1
not forthcoming(expression, adjective, quiet, shy, silent)
1
not talkative(expression, adjective, close, quiet, restrained)
1
reserved(adjective, close, quiet, soft, low)
1
secretive(adjective, close, quiet, soft, low)
1
soundless(adjective, close, quiet, soft, low)
1
speechless(adjective, close, quiet, soft, low)
1
still(adjective, close, quiet, soft, low)
1
taciturn(adjective, close, quiet, soft, low)
1
tongue-tied(adjective, quiet, still, shy, silent)
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APASmart Define. (2015). unspeaking thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unspeaking/thesaurus/synonyms
ChicagoSmart Define. 2015. "unspeaking thesaurus" https://smartdefine.org/unspeaking/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unspeaking thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unspeaking/thesaurus/synonyms>.
MLASmart Define. "unspeaking thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/unspeaking/thesaurus/synonyms>