52 entries under origin topic. ×
| core(cause, source) | |
| crux(cause, source) | |
| derivation(cause, source) | |
| essentiality(cause, source) | |
| fountain(cause, source) | |
| fountainhead(cause, quick, source, stem) | |
| germ(cause, source) | |
| inception(cause, source) | |
| infrastructure(cause, quick, source, stem) | |
| mainspring(cause, quick, source, stem) | |
| marrow(cause, source) | |
| motive(cause, source) | |
| nub(cause, source) | |
| nucleus(cause, source) | |
| occasion(cause, source) | |
| provenance(cause, source) | |
| provenience(cause, source) | |
| quick(cause, source, stem) | |
| quintessence(cause, source) | |
| radicle(cause, quick, source, stem) |
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| APA | Smart Define. (2015). rock bottom thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rock_bottom/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rock bottom thesaurus" https://smartdefine.org/rock_bottom/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, rock bottom thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rock_bottom/thesaurus/synonyms>. |
| MLA | Smart Define. "rock bottom thesaurus" 9 July 2015. Web. 24 September 2026. <https://smartdefine.org/rock_bottom/thesaurus/synonyms> |