75 entries under noun topic. ×
| enigma(trouble, challenge, question, puzzle) | |
| mystery(trouble, challenge, unknown, puzzle) | |
| occult(adjective, evil, obscure, dark) | |
| riddle(trouble, challenge, question, puzzle) | |
| conundrum(trouble, challenge, question, puzzle) | |
| closed book(expression, idiom, trouble, challenge) | |
| puzzle(trouble, challenge, question, mystery) | |
| unknown(adjective, obscure, dark, superior) | |
| unrevealed(adjective, obscure, dark, mysterious) | |
| arcanum | |
| brain-teaser(trouble, challenge, question, puzzle) | |
| confidence(hint, exclusive, buzz, gossip) | |
| trick | |
| whodunit(question, puzzle, perplexity, obscurity) | |
| code(confidence, mystery, unrevealed, enigma) | |
| mystery story(expression, idiom, mystery) | |
| obscurity(vagueness, ambiguity, secrecy, anonymity) | |
| oracle(question, confidence, puzzle, obscurity) | |
| puzzlement(trouble, challenge, question, puzzle) | |
| key(confidence, means, interpretation, mystery) |
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| APA | Smart Define. (2016). secret thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/secret/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "secret thesaurus" https://smartdefine.org/secret/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, secret thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/secret/thesaurus/synonyms>. |
| MLA | Smart Define. "secret thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/secret/thesaurus/synonyms> |