15 entries under idiom topic. ×
| tough nut to crack(expression, question, secret, puzzle) | |
| Riddle of the Sphinx | |
| crux criticorum(expression, secret) | |
| crystal gazer(expression, oracle) | |
| egyptian lion-like statue | |
| fortune teller(expression, oracle) | |
| hawk moth | |
| mythical creature | |
| mythical monster | |
| nut to crack(expression, secret) | |
| sea serpent(expression, unconformity) | |
| sibylline leaves | |
| skeleton in cupboard(expression, perplexity, abstruseness, inscrutableness) | |
| sphinx's riddle | |
| star gazer(expression, oracle) |
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| APA | Smart Define. (2015). sphinx thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sphinx/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sphinx thesaurus" https://smartdefine.org/sphinx/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, sphinx thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sphinx/thesaurus/synonyms>. |
| MLA | Smart Define. "sphinx thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/sphinx/thesaurus/synonyms> |