143 entries under source topic. ×
| cause(noun, support, regulation, action, start) | |
| heart(noun, support, action, part, quality) | |
| nexus(noun, support, action, connection, link) | |
| rudiment(noun, support, action, beginning) | |
| antecedent(noun, support, action, cause, reason) | |
| center(noun, verb, support, action, body) | |
| start(noun, verb, form, cause, settle) | |
| crux(adjective, organization, support, action, quality) | |
| germ(noun, quality, cause, start, character) | |
| radix(noun, cause, origin) | |
| rock bottom(noun, expression, cause, origin) | |
| starting point(noun, expression, idiom, cause, start) | |
| agent(cause, derivation, causes) | |
| ancestor(noun, cause, influence, derivation) | |
| background(noun, organization, support, action, study) | |
| beginning(noun, cause, start, well, stock) | |
| essential(noun, support, action, part, beginning) | |
| nucleus(noun, support, action, quality, body) | |
| origination(noun, cause, derivation) | |
| theory(noun, concept, support, action, philosophy) |
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| APA | Smart Define. (2015). base thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/base/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "base thesaurus" https://smartdefine.org/base/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, base thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/base/thesaurus/synonyms>. |
| MLA | Smart Define. "base thesaurus" 3 August 2015. Web. 20 September 2026. <https://smartdefine.org/base/thesaurus/synonyms> |