- Definitions|1
- Thesaurus|67
- Abbreviations|0
15 entries under challenge topic. ×
| conundrum(noun, trouble, difficulty, informal) | |
| enigma(noun, trouble, question, puzzle) | |
| riddle(noun, trouble, question, puzzle) | |
| mystery(noun, trouble, question, puzzle) | |
| closed book(noun, expression, trouble, puzzle) | |
| secret(noun, trouble, question, puzzle) | |
| problem(noun, trouble, question, puzzle) | |
| puzzle(noun, trouble, question, mystery) | |
| puzzlement(noun, trouble, question, puzzle) | |
| poser(noun, trouble, question, puzzle) | |
| mystification(noun, trouble, question, puzzle) | |
| paradox(noun, trouble, question, puzzle) | |
| why(noun, trouble, puzzle) | |
| dilemma(noun, trouble, question, puzzle) | |
| crux(noun, trouble, puzzle) |
For more, visit
Brain-teaser on
Power Thesaurus
| APA | Smart Define. (2016). brain-teaser thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/brain-teaser/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "brain-teaser thesaurus" https://smartdefine.org/brain-teaser/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, brain-teaser thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/brain-teaser/thesaurus/synonyms>. |
| MLA | Smart Define. "brain-teaser thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/brain-teaser/thesaurus/synonyms> |