- Definitions|1
- Thesaurus|296
- Abbreviations|0
15 entries under expression topic. ×
| tough nut to crack(noun, idiom, puzzle, mystery) | |
| closed book(noun, difficulty, question, puzzle) | |
| nut to crack | |
| sixty-four-thousand-dollar question(noun, difficulty, question, puzzle) | |
| sixty-four dollar question | |
| stumbling block(noun, difficulty, trick, problem) | |
| confidential information(perplexity, abstruseness, inscrutableness) | |
| fly in the ointment(noun, idiom, trick, deception) | |
| hidden disadvantage(noun, trick, deception, snag) | |
| magic number(perplexity, abstruseness, inscrutableness) | |
| privileged information(perplexity, abstruseness, inscrutableness) | |
| sixty-four thousand dollar question(noun, idiom, challenge, question) | |
| skeleton in cupboard(idiom, perplexity, abstruseness, inscrutableness) | |
| tight spot(difficulty, disadvantage, bug, impediment) | |
| tough one(verb, phrasal verb) |
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| APA | Smart Define. (2015). puzzler thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/puzzler/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "puzzler thesaurus" https://smartdefine.org/puzzler/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, puzzler thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/puzzler/thesaurus/synonyms>. |
| MLA | Smart Define. "puzzler thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/puzzler/thesaurus/synonyms> |