51 entries under source topic. ×

2
nucleus(cause, origin)
2
provenance(cause, origin)
2
provenience(cause, origin)
2
quick(cause, root, origin, stem)
2
seed(cause, origin)
1
essence(cause, origin)
1
essentiality(cause, origin)
1
germ(cause, origin)
1
mainspring(cause, quick, root, origin)
1
marrow(cause, root, origin, mainspring)
1
quintessence(cause, origin)
1
rock bottom(expression, cause, quick, origin)
1
seat(cause, quick, origin, stem)
1
soul(cause, origin)
0
cause
0
crux(cause, origin)
0
footing(cause, quick, origin, stem)
0
fountain(cause, origin)
0
fountainhead(cause, quick, origin, stem)
0
heart(cause, root, origin, mainspring)
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APASmart Define. (2015). radix thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/radix/thesaurus/synonyms
ChicagoSmart Define. 2015. "radix thesaurus" https://smartdefine.org/radix/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, radix thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/radix/thesaurus/synonyms>.
MLASmart Define. "radix thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/radix/thesaurus/synonyms>