133 entries under core topic. ×

5
nub(noun, adjective, quality, body, cause)
5
radicle(noun, cause, base, source)
5
soul(noun, quality, cause, character, spirit)
4
hub(noun, support, place, start, point)
4
occasion(noun, cause, reason, object, base)
4
quintessence(noun, quality, cause, character, spirit)
4
rhizome(noun, cause, base, source)
4
substratum(noun, support, action, cause, reason)
4
underpinning(noun, organization, support, action, cause)
3
element(noun, feature, drop, part, quality)
3
essentiality(noun, quality, cause, character, spirit)
3
focal point(noun, expression, support, place, point)
3
fundamental(noun, adjective, support, action, drop)
3
mainspring(noun, cause, reason, idea, object)
3
polestar(noun, place, emotion, quick, heart)
3
resolution(noun, answer, emotion, means, mood)
3
rock bottom(noun, expression, cause, base)
2
bottom line(noun, expression, support, body, spirit)
2
meat(noun, quality, body, character, spirit)
2
pluck(noun, verb, emotion, mood, temperament)
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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>