430 entries under noun topic. ×

8
etymon(cause, word)
8
marrow(place, quality, cause, character)
8
quick(place, body, cause, start)
8
radical(adjective, original, basic, fundamental)
8
radix(cause, base, source, core)
8
theme
8
tuber(nature, cause, base, source)
7
ancestor(person, cause, source, derivation)
7
ascendent
7
derivation(cause, start, point, base)
7
descent
7
fountain(cause, start, point, base)
7
ground(verb, form, support, cause)
7
grounds(cause, reason, substance, object)
7
groundwork(support, cause, rest, base)
7
infrastructure(organization, support, action, cause)
7
nucleus(support, action, place, quality)
7
origination(cause, top, opening, foundation)
7
pith(place, quality, body, cause)
7
provenance(cause, start, point, base)
10 years ago|23k views|share |citing 
APASmart Define. (2016). root thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/root/thesaurus/synonyms
ChicagoSmart Define. 2016. "root thesaurus" https://smartdefine.org/root/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, root thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/root/thesaurus/synonyms>.
MLASmart Define. "root thesaurus" 2 March 2016. Web. 23 September 2026. <https://smartdefine.org/root/thesaurus/synonyms>