59 entries under base topic. ×
| occasion(noun, verb, cause, start, reason) | |
| antecedent(noun, cause, reason, matter) | |
| wellspring(noun, person, cause, start) | |
| ancestor(noun, person, cause, beginning) | |
| bottom(noun, cause, source, core) | |
| determinant(noun, person, cause, reason) | |
| fountainhead(noun, person, cause, start, rise) | |
| mainspring(noun, verb, cause, start, reason) | |
| core(noun, cause, start, beginning) | |
| inducement(noun, cause, reason, matter) | |
| kickoff(noun, start, top, beginning) | |
| square one(noun, expression, cause, start, top) | |
| causation(noun, cause, reason, matter) | |
| groundwork(noun, cause, source, foundation) | |
| heart(verb, body, cause, source) | |
| reason(noun, regulation, cause, start) | |
| fundamental(noun, adjective, law, regulation, cause) | |
| preparation(noun, beginning, basis) | |
| background(noun, place, position, circle) | |
| bottom line(expression, body, heart, center) |
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| APA | Smart Define. (2015). origin thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/origin/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "origin thesaurus" https://smartdefine.org/origin/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, origin thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/origin/thesaurus/synonyms>. |
| MLA | Smart Define. "origin thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/origin/thesaurus/synonyms> |