26 entries under challenge topic. ×
| problem(noun, trouble, difficulty, question) | |
| riddle(noun, trouble, difficulty, question) | |
| enigma(noun, trouble, difficulty, question) | |
| conundrum(noun, trouble, difficulty, informal) | |
| mystery(noun, trouble, difficulty, question) | |
| puzzle(noun, difficulty, question, secret) | |
| stumper(noun, difficulty, question, secret) | |
| brainteaser(noun, difficulty, question, secret) | |
| puzzlement(noun, trouble, question, secret) | |
| why(noun, trouble, difficulty, question) | |
| closed book(noun, expression, trouble, question) | |
| example(noun, question, puzzle, mystery) | |
| brain-teaser(noun, trouble, puzzle) | |
| mystification(noun, trouble, question, secret) | |
| mind-boggler(noun, question, puzzle, example) | |
| puzzler(noun, difficulty, question, puzzle) | |
| stickler(noun, difficulty, question, secret) | |
| teaser(noun, difficulty, question, secret) | |
| twister(noun, difficulty, question, secret) | |
| grabber(noun, difficulty, question, secret) |
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| APA | Smart Define. (2016). poser thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/poser/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "poser thesaurus" https://smartdefine.org/poser/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, poser thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/poser/thesaurus/synonyms>. |
| MLA | Smart Define. "poser thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/poser/thesaurus/synonyms> |