33 entries under difficulty topic. ×
| cliffhanger(question, secret, puzzle, obscurity) | |
| grabber(noun, challenge, question, problem) | |
| inscrutability(question, secret, puzzle, obscurity) | |
| inscrutableness(question, secret, puzzle, obscurity) | |
| mindboggler(question, secret, puzzle, obscurity) | |
| occult(question, confidence, secret, puzzle) | |
| oracle(question, confidence, secret, puzzle) | |
| rune(question, secret, puzzle, obscurity) | |
| secrecy(question, secret, puzzle, obscurity) | |
| sixty-four-thousand-dollar question(expression, question, secret, puzzle) | |
| sphinx(question, secret, puzzle, obscurity) | |
| subtlety(question, secret, puzzle, obscurity) | |
| thriller(question, secret, puzzle, obscurity) |
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| APA | Smart Define. (2016). riddle thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/riddle/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "riddle thesaurus" https://smartdefine.org/riddle/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, riddle thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/riddle/thesaurus/synonyms>. |
| MLA | Smart Define. "riddle thesaurus" 1 April 2016. Web. 20 September 2026. <https://smartdefine.org/riddle/thesaurus/synonyms> |