| breathless | |
| brooding(aloof, reserved, reticent, uncommunicative) | |
| brusque | |
| buttoning up(expression, adjective, quiet, reserved, secret) | |
| cagey(quiet, restrained, mysterious, private, reticent) | |
| callous(adjective, indifferent, detached, distant, apathetic) | |
| can't say boo to a goose(adjective, calm, quiet, humble) | |
| cartoon | |
| cataleptic | |
| catlike(adjective, sneak, skulking) | |
| chiller | |
| cinema | |
| clamming up(expression, adjective, quiet, reserved, secret) | |
| close-tongued | |
| closed(adjective, calm, quiet, smooth, tranquil) | |
| cold(adjective, quiet, indifferent, detached, unfriendly) | |
| compact | |
| constant | |
| continual | |
| controlled |
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| APA | Smart Define. (2016). silent thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/silent/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "silent thesaurus" https://smartdefine.org/silent/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, silent thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/silent/thesaurus/synonyms>. |
| MLA | Smart Define. "silent thesaurus" 3 April 2016. Web. 23 September 2026. <https://smartdefine.org/silent/thesaurus/synonyms> |