136 entries under source topic. ×
| inspiration(noun, cause, basis, spring) | |
| originator(noun, person, cause, reason, authority) | |
| outbreak(noun, cause, start, beginning) | |
| roots(noun, cause, line, basis) | |
| square one(noun, expression, cause, start, top) | |
| beginnings(noun, cause, family, heritage) | |
| blast off(noun, expression, cause, beginning) | |
| causation(noun, cause, reason, base, matter) | |
| groundwork(noun, cause, base, foundation) | |
| heart(verb, body, cause, base) | |
| ingress(noun, cause, beginning, derivation) | |
| reason(noun, regulation, cause, start, base) | |
| whence(adverb, upwelling) | |
| causality(noun, cause, basis, derivation) | |
| center(person, body, cause, heart) | |
| fundamental(noun, adjective, law, regulation, cause) | |
| grounds(noun, reason, matter, agent) | |
| leaven(noun, cause, reason, matter) | |
| prime mover(noun, expression, idiom, cause, reason) | |
| radix |
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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> |