| Keep to oneself | |
| Play dumb | |
| Tell no-one | |
| adj | |
| aghast(awkward, silent, dazed, dumb, amazed) | |
| alfalfa | |
| amaryllis | |
| amazed(awkward, silent, dazed, dumb, astonished) | |
| anemone | |
| aphasiac(silent, muffled, voiceless) | |
| aphonous | |
| aster | |
| astonished(thunderstruck, flabbergasted) | |
| astounded(awkward, silent, dazed, dumb, amazed) | |
| at a loss for words(expression, idiom, quiet, awkward, silent) | |
| backstairs | |
| be silent(expression, idiom, taciturnity) | |
| begonia | |
| bite one's tongue(expression, idiom, taciturnity) | |
| bluebell |
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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> |