7 entries under expression topic. ×
| classified information(noun, confidence, mystery) | |
| magic number(noun, confidence, secret, perplexity) | |
| privileged information(noun, confidence, secret, perplexity) | |
| closed book(perplexity, abstruseness, inscrutableness) | |
| skeleton in cupboard(idiom, confidence, secret, perplexity) | |
| skeleton in the cupboard(idiom, confidence, mystery) | |
| tough nut to crack(idiom, perplexity, abstruseness, inscrutableness) |
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| APA | Smart Define. (2015). confidential information thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/confidential_information/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "confidential information thesaurus" https://smartdefine.org/confidential_information/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, confidential information thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/confidential_information/thesaurus/synonyms>. |
| MLA | Smart Define. "confidential information thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/confidential_information/thesaurus/synonyms> |