40 entries under question topic. ×
| riddle(noun, difficulty, secret, puzzle) | |
| puzzle(noun, difficulty, secret, obscurity) | |
| charade(noun, secret, puzzle, subtlety) | |
| enigma(noun, difficulty, secret, puzzle) | |
| problem(noun, difficulty, secret, puzzle) | |
| closed book(expression, secret, puzzle, subtlety) | |
| mystery(noun, difficulty, secret, puzzle) | |
| sixty-four-thousand-dollar question(expression, secret, puzzle, subtlety) | |
| tough nut to crack(expression, idiom, secret, puzzle) | |
| abstruseness(difficulty, secret, puzzle, subtlety) | |
| brainteaser(difficulty, secret, puzzle, subtlety) | |
| braintwister(difficulty, secret, puzzle, subtlety) | |
| chiller(difficulty, secret, puzzle, subtlety) | |
| cliffhanger(difficulty, secret, puzzle, obscurity) | |
| crux(difficulty, secret, puzzle, obscurity) | |
| cryptogram(difficulty, secret, puzzle, obscurity) | |
| difficulty(secret, puzzle, obscurity, subtlety) | |
| grabber(difficulty, secret, puzzle, perplexity) | |
| inscrutability(difficulty, secret, puzzle, subtlety) | |
| inscrutableness(difficulty, secret, puzzle, subtlety) |
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| APA | Smart Define. (2015). rebus thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rebus/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rebus thesaurus" https://smartdefine.org/rebus/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, rebus thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rebus/thesaurus/synonyms>. |
| MLA | Smart Define. "rebus thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/rebus/thesaurus/synonyms> |