85 entries under source topic. ×

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beginnings(cause, quick, origin, stem)
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derivation(cause, origin)
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essentiality(cause, origin)
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fountain(cause, origin)
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fountainhead(cause, quick, origin, stem)
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germ(cause, origin)
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inception(cause, origin)
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mainspring(cause, quick, origin, stem)
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marrow(cause, origin)
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nub(cause, substance, basis, origin)
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origin(cause, base, basis)
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pith(cause, origin)
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provenance(cause, origin)
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provenience(cause, origin)
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quick(cause, origin, stem)
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quintessence(cause, origin)
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radicle(cause, quick, origin, stem)
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radix(cause, quick, origin, stem)
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rhizome(cause, quick, origin, stem)
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seed(cause, origin)
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APASmart Define. (2015). substratum thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/substratum/thesaurus/synonyms
ChicagoSmart Define. 2015. "substratum thesaurus" https://smartdefine.org/substratum/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, substratum thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/substratum/thesaurus/synonyms>.
MLASmart Define. "substratum thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/substratum/thesaurus/synonyms>