| deafmute | |
| dense | |
| dim | |
| discreet(quiet, restrained) | |
| dried up(expression, quiet, restrained, discreet) | |
| dull | |
| dummy | |
| fatherhood | |
| female parent(expression, idiom) | |
| flabbergasted(astonished, thunderstruck) | |
| formal mater | |
| gobsmacked(astonished, thunderstruck, flabbergasted) | |
| hesitant(quiet, restrained, discreet) | |
| hidden(adjective, quiet, silent, taciturn) | |
| hist | |
| hold one's jaw(expression, idiom, taciturnity) | |
| hold one's peace(expression, idiom, taciturnity) | |
| hold one's tongue(expression, idiom, taciturnity) | |
| horsed | |
| horsey |
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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> |