116 entries under base topic. ×
| principle(noun, law, support, action, cause) | |
| bottom(noun, cause, start, beginning) | |
| mainspring(noun, cause, start, reason, idea) | |
| motive(noun, cause, start, reason, idea) | |
| starting point(noun, expression, idiom, cause, start) | |
| cradle(noun, place, cause, spot) | |
| creator(noun, person, cause, reason) | |
| progenitor(noun, person, cause, beginning) | |
| reason(noun, support, regulation, action, cause) | |
| agent(noun, cause, reason, matter) | |
| ancestor(noun, person, cause, beginning) | |
| groundwork(noun, cause, start, beginning) | |
| occasion(noun, cause, start, reason) | |
| element(noun, cause, influence, reason) | |
| embryo(noun, cause, influence, beginning) | |
| causation(noun, cause, reason, matter) | |
| core(noun, support, action, cause, start) | |
| kickoff(noun, start, top, beginning) | |
| nucleus(noun, support, action, cause, start) | |
| egg(noun, cause, influence, beginning) |
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| APA | Smart Define. (2015). source thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/source/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "source thesaurus" https://smartdefine.org/source/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, source thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/source/thesaurus/synonyms>. |
| MLA | Smart Define. "source thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/source/thesaurus/synonyms> |