| mimic | |
| mousy(quiet, soft, still, silent, hushed) | |
| muffled(quiet, soft, low, silent, voiceless) | |
| mummer | |
| not forthcoming(expression, adjective, quiet, silent, tight-lipped) | |
| not talkative(expression, adjective, quiet, reticent, silent) | |
| parent | |
| quiet speechless(expression, still, hushed, soundless) | |
| quietude | |
| rest | |
| restrained(quiet, still, reticent, silent, discreet) | |
| sententious(aloof, reserved, reticent, uncommunicative) | |
| short | |
| shush | |
| silentious(still, hushed, soundless) | |
| snug | |
| sparing(aloof, reserved, reticent, uncommunicative) | |
| sparing of words(expression, idiom) | |
| stillness | |
| stricken dumb |
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| APA | Smart Define. (2015). mum thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/mum/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mum thesaurus" https://smartdefine.org/mum/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, mum thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/mum/thesaurus/synonyms>. |
| MLA | Smart Define. "mum thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/mum/thesaurus/synonyms> |