68 entries under essential topic. ×
| core(noun, adjective, organization, support, action) | |
| heart(noun, support, action, part, quality) | |
| essence(noun, organization, support, action, area) | |
| nucleus(noun, support, action, quality, body) | |
| base(adjective, organization, support, action, quality) | |
| spirit(noun, quality, character, significance, emotion) | |
| center(noun, support, action, body, cause) | |
| fundamental(noun, support, action, cause, start) | |
| keystone(noun, support, action, idea, base) | |
| quiddity(noun, quality, character, spirit, significance) | |
| root(noun, support, action, quality, cause) | |
| explanation(noun, support, action, point, base) | |
| keynote(noun, support, action, idea, base) | |
| nexus(noun, support, action, join, point) | |
| principle(noun, support, action, quality, character) | |
| sine qua non(noun, expression, idiom, heart) | |
| action(noun, support, base, beginning, source) | |
| antecedent(noun, support, action, base, beginning) | |
| aspect(noun, quality, character, spirit, significance) | |
| assumption(noun, support, action, base, beginning) |
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| APA | Smart Define. (2015). crux thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/crux/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "crux thesaurus" https://smartdefine.org/crux/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, crux thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/crux/thesaurus/synonyms>. |
| MLA | Smart Define. "crux thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/crux/thesaurus/synonyms> |