140 entries under challenge topic. ×
| lock horns(verb, expression, question, contest) | |
| mind-boggler(noun, doubt, question, uncertainty) | |
| moot(verb, question, contest, impugn) | |
| negate(verb, dispute, doubt, question) | |
| pick a bone(verb, expression, idiom, question) | |
| puzzler(noun, doubt, question, uncertainty) | |
| quarrel(verb, question, contest, impugn) | |
| quibble(verb, question, contest, impugn) | |
| rebut(verb, question, contest, impugn) | |
| refute(verb, question, contest, impugn) | |
| riddle(noun, doubt, question, uncertainty) | |
| sixty-four thousand dollar question(noun, expression, idiom, question) | |
| stickler(noun, doubt, question, uncertainty) | |
| stumper(noun, doubt, question, uncertainty) | |
| take on(verb, expression, question, contest) | |
| teaser(noun, doubt, question, uncertainty) | |
| thrash out(verb, expression, question, contest) | |
| toss around(verb, expression, question, contest) | |
| twister(noun, doubt, question, uncertainty) | |
| wrangle(verb, question, contest, impugn) |
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| APA | Smart Define. (2016). query thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/query/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "query thesaurus" https://smartdefine.org/query/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, query thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/query/thesaurus/synonyms>. |
| MLA | Smart Define. "query thesaurus" 17 February 2016. Web. 23 September 2026. <https://smartdefine.org/query/thesaurus/synonyms> |