| fathom(verb, separate, drain, comb, filter) | |
| find the answer(expression, idiom) | |
| find the solution(expression, idiom) | |
| frontiers of knowledge(expression, idiom) | |
| infect(verb, fill, overrun) | |
| informalbrain-teaser(noun, dilemma, paradox, enigma) | |
| interpenetrate | |
| make a mark(expression, idiom) | |
| matter of ignorance(expression, idiom) | |
| mesh | |
| mystery story(noun, mystery) | |
| nonplus | |
| not make sense(expression, idiom) | |
| pepper(verb, permeate, perforate) | |
| plight | |
| predicament | |
| puzzler(noun, show, difficulty, challenge, question) | |
| quandary | |
| separate(verb, arrange, organize, rank, drain) | |
| shoot to death(expression, idiom) |
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| APA | Smart Define. (2016). riddle thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/riddle/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "riddle thesaurus" https://smartdefine.org/riddle/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, riddle thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/riddle/thesaurus/synonyms>. |
| MLA | Smart Define. "riddle thesaurus" 1 April 2016. Web. 20 September 2026. <https://smartdefine.org/riddle/thesaurus/synonyms> |