48 entries under secret topic. ×
| code(noun, confidence, mystery) | |
| crux(noun, trouble, challenge, question) | |
| logogriph | |
| teaser(noun, difficulty, challenge, question, problem) | |
| stickler(noun, difficulty, challenge, question, problem) | |
| stumper(noun, difficulty, challenge, question, problem) | |
| tough nut to crack(noun, expression, idiom, question) | |
| twister(noun, difficulty, challenge, question, problem) | |
| abstruseness(difficulty, question, puzzle, obscurity) | |
| braintwister(difficulty, question, puzzle, obscurity) | |
| chiller(difficulty, question, puzzle, obscurity) | |
| cliffhanger(difficulty, question, puzzle, obscurity) | |
| difficulty(question, puzzle, obscurity, mystery) | |
| grabber(noun, difficulty, challenge, question, problem) | |
| inscrutability(difficulty, question, puzzle, obscurity) | |
| inscrutableness(difficulty, question, puzzle, obscurity) | |
| mindboggler(difficulty, question, puzzle, obscurity) | |
| monogram | |
| nut to crack(expression, idiom) | |
| occult(difficulty, question, confidence, puzzle) |
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| APA | Smart Define. (2016). riddle thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/riddle/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "riddle thesaurus" https://smartdefine.org/riddle/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, riddle thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/riddle/thesaurus/synonyms>. |
| MLA | Smart Define. "riddle thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/riddle/thesaurus/synonyms> |