32 entries under difficulty topic. ×
| riddle(noun, question, secret, puzzle) | |
| puzzle(noun, question, secret, obscurity) | |
| enigma(noun, question, secret, puzzle) | |
| problem(noun, question, secret, puzzle) | |
| mystery(noun, question, secret, puzzle) | |
| abstruseness(question, secret, puzzle, subtlety) | |
| brainteaser(question, secret, puzzle, subtlety) | |
| braintwister(question, secret, puzzle, subtlety) | |
| chiller(question, secret, puzzle, subtlety) | |
| cliffhanger(question, secret, puzzle, obscurity) | |
| crux(question, secret, puzzle, obscurity) | |
| cryptogram(question, secret, puzzle, obscurity) | |
| grabber(question, secret, puzzle, perplexity) | |
| inscrutability(question, secret, puzzle, subtlety) | |
| inscrutableness(question, secret, puzzle, subtlety) | |
| mindboggler(question, secret, puzzle, subtlety) | |
| occult(question, secret, puzzle, subtlety) | |
| oracle(question, secret, puzzle, subtlety) | |
| perplexity(noun, question, secret, puzzle) | |
| question(secret, puzzle, obscurity, subtlety) |
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| APA | Smart Define. (2015). rebus thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rebus/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rebus thesaurus" https://smartdefine.org/rebus/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, rebus thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rebus/thesaurus/synonyms>. |
| MLA | Smart Define. "rebus thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/rebus/thesaurus/synonyms> |