| impulse(noun, verb, cause, source, basis) | |
| inducement(noun, cause, reason, base, matter) | |
| inspiration(noun, cause, source, basis, spring) | |
| institution | |
| kickoff(noun, start, top, base, beginning) | |
| line of descent(noun, expression, idiom) | |
| originator(noun, person, cause, reason, authority) | |
| outbreak(noun, cause, start, beginning, source) | |
| rootage | |
| roots(noun, cause, line, source, basis) | |
| square one(noun, expression, cause, start, top) | |
| beginnings(noun, cause, source, family, heritage) | |
| blast off(noun, expression, cause, beginning, source) | |
| causation(noun, cause, reason, base, matter) | |
| clan(noun, family, blood, genus) | |
| declension | |
| declination | |
| decline | |
| formation(noun, start, beginning, birth, dawn) | |
| founding(noun, start) |
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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> |