51 entries under basic topic. ×

1
substrative(adjective, important, significant, original, essential)
1
supporting(adjective, important, significant, original, essential)
1
sustaining(adjective, important, significant, original, essential)
1
theoretical(adjective, important, significant, original, essential)
1
underivative(adjective, simple, authentic, unsophisticated)
1
underlying(adjective, rough, important, significant, original)
1
vital(adjective, important, significant, original, essential)
0
bottom line(expression, important, significant, essential)
0
deep(original, primary)
0
deep-seated(original, primary)
0
grassroots(adjective, important, significant, essential)
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APASmart Define. (2015). underived thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/underived/thesaurus/synonyms
ChicagoSmart Define. 2015. "underived thesaurus" https://smartdefine.org/underived/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, underived thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/underived/thesaurus/synonyms>.
MLASmart Define. "underived thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/underived/thesaurus/synonyms>