143 entries under source topic. ×
| chief constituent(noun, expression, part, quality, character) | |
| chief ingredient(noun, expression, support, action, beginning) | |
| derivation(noun, cause, influence, origin) | |
| embryo(cause, influence, derivation, ancestry) | |
| essentiality(noun, quality, cause, start, character) | |
| explanation(noun, support, action, beginning) | |
| fountain(cause, influence, origin, derivation) | |
| hard fact(noun, expression, support, action, beginning) | |
| important part(noun, expression, part, origin) | |
| inception(cause, influence, origin, derivation) | |
| justification(noun, support, action, cause, reason) | |
| keynote(noun, support, action, beginning) | |
| keystone(noun, support, action, beginning) | |
| law(noun, support, action, beginning, behavior) | |
| mainspring(cause, foundation, ground, origin) | |
| marrow(noun, quality, cause, start, character) | |
| motive(cause, reason, basis, justification) | |
| nub(noun, quality, body, cause, start) | |
| pith(noun, organization, quality, body, cause) | |
| postulate(noun, concept, support, regulation, action) |
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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> |