75 entries under noun topic. ×
| cabala | |
| classified information(expression, confidence, mystery, unrevealed) | |
| esoterica | |
| formula(design, conclusion, confidence, means) | |
| mystification(trouble, challenge, question, puzzle) | |
| paradox(trouble, challenge, question, puzzle) | |
| password(confidence, mystery, unrevealed) | |
| perplexity(question, problem, puzzle, obscurity) | |
| private matter | |
| brainteaser(question, puzzle, perplexity, obscurity) | |
| cipher(confidence, mystery, unrevealed) | |
| crux(trouble, challenge, question, puzzle) | |
| discovery(treasure, invention) | |
| head-scratcher(trouble, challenge, brainteaser) | |
| stealth(hidden, spy, covert) | |
| teaser(question, puzzle, knot, mystery) | |
| whisper(information, hint, word, rumor) | |
| problem(trouble, challenge, question, puzzle) | |
| confidential information(expression, confidence, perplexity, mystery) | |
| confidential matter |
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| APA | Smart Define. (2016). secret thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/secret/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "secret thesaurus" https://smartdefine.org/secret/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, secret thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/secret/thesaurus/synonyms>. |
| MLA | Smart Define. "secret thesaurus" 31 March 2016. Web. 29 September 2026. <https://smartdefine.org/secret/thesaurus/synonyms> |