153 entries under source topic. ×

5
bedrock(noun, support, action, cause, reason)
5
crux(noun, support, action, quality, cause)
5
fountainhead(noun, cause, start, point, base)
5
nub(noun, adjective, quality, body, cause)
5
radicle(noun, cause, base, core)
5
soul(noun, quality, cause, character, spirit)
5
stock(fix, cause, establish, derivation)
4
occasion(noun, cause, reason, object, base)
4
quintessence(noun, quality, cause, character, spirit)
4
rhizome(noun, cause, base, core)
4
roots(noun, cause, derivation)
4
start(noun, verb, form, fix, cause)
4
substratum(noun, support, action, cause, reason)
4
support(noun, verb, organization, action, praise)
4
underpinning(noun, organization, support, action, cause)
4
wellspring(noun, cause, start, beginning, well)
3
determinant(noun, cause, reason, object, base)
3
element(noun, feature, drop, part, quality)
3
essentiality(noun, quality, cause, character, spirit)
3
font(noun, cause, supply, foundation)
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APASmart Define. (2016). root thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/root/thesaurus/synonyms
ChicagoSmart Define. 2016. "root thesaurus" https://smartdefine.org/root/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, root thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/root/thesaurus/synonyms>.
MLASmart Define. "root thesaurus" 2 March 2016. Web. 20 September 2026. <https://smartdefine.org/root/thesaurus/synonyms>