| deal breaker(challenge, case, matter, knot) | |
| physics(issue, challenge, case, matter) | |
| tushy(core, chief, bulk, generality) | |
| conundrum | |
| outer core(body, chief, bulk, generality) | |
| vestigal structure(core, chief, bulk, brunt) |
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| APA | Smart Define. (2015). crux thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/crux/thesaurus/related |
| Chicago | Smart Define. 2015. "crux thesaurus" https://smartdefine.org/crux/thesaurus/related (accessed October 1, 2026). |
| Harvard | Smart Define 2015, crux thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/crux/thesaurus/related>. |
| MLA | Smart Define. "crux thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/crux/thesaurus/related> |