| distant(aloof, reserved, reticent, uncommunicative) | |
| dour(aloof, reserved, reticent, uncommunicative) | |
| dried-up(aloof, reserved, reticent, uncommunicative) | |
| dumbstricken | |
| dummied up(expression, adjective, quiet, soft, restrained) | |
| economical of words(expression, idiom) | |
| faint(quiet, soft, low, still, silent) | |
| father | |
| female relative | |
| iced(adjective, quiet, soft, still, silent) | |
| implied | |
| incoherent(quiet, soft, still, silent, hushed) | |
| inconversable(quiet, soft, still, silent, hushed) | |
| indisposed to talk(expression, idiom) | |
| indistinct(quiet, soft, still, silent, hushed) | |
| inhibited(quiet, soft, still, silent, hushed) | |
| lull | |
| lulled(adjective, silent) | |
| mammies | |
| milliampere |
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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> |