102 entries under secret topic. ×
| matter in dispute(noun, expression, idiom, question) | |
| moot point(noun, expression, idiom, question) | |
| rebus(noun, question, puzzle, brain-twister) | |
| brain twister(noun, expression, idiom, difficult, issue) | |
| mind-boggler(noun, challenge, question, problem) | |
| obscurity(noun, difficult, issue, question) | |
| vexed question(noun, expression, idiom, trouble, challenge) | |
| cliffhanger(noun, difficulty, question, puzzle) | |
| diagnus vindice nodus(noun, expression, idiom, problem) | |
| jigsaw puzzle(expression, idiom, mystery, brain-twister) | |
| knot(noun, informal, question, dilemma) | |
| open question(noun, expression, idiom, question) | |
| parable(noun, question, dilemma, mystery) | |
| plain question(noun, expression, idiom, question) | |
| point in dispute(noun, expression, idiom, question) | |
| question at issue(noun, expression, idiom, question) | |
| sealed book(noun, expression, idiom, problem) | |
| sixty-four dollar question(noun, expression, idiom, question) | |
| subject of controversy(noun, expression, idiom, question) | |
| subject of inquiry(noun, expression, idiom, question) |
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| APA | Smart Define. (2016). enigma thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/enigma/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "enigma thesaurus" https://smartdefine.org/enigma/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, enigma thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/enigma/thesaurus/synonyms>. |
| MLA | Smart Define. "enigma thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/enigma/thesaurus/synonyms> |