97 entries under basic topic. ×

1
grass-roots(adjective, important, significant, original, essential)
1
inherent(adjective, material, natural, essential)
1
innate(material, natural, living, functional)
1
intrinsic(adjective, important, significant, natural, original)
1
meat-and-potatoes(adjective, important, significant, original, essential)
1
natural(material, living, functional, nuclear)
1
nitty-gritty(adjective, important, original, essential)
1
nuclear(material, natural, living, functional)
1
original(adjective, body, material, important, significant)
1
plasmic(material, natural, living, functional)
1
primordial(adjective, important, significant, original, essential)
1
root(adjective, original, fundamental, hidden)
1
structural(material, important, significant, natural, original)
1
substratal(adjective, important, significant, original, essential)
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
underived(adjective, important, significant, original, essential)
0
binding(adjective, significant, essential, required)
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APASmart Define. (2015). vital thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/vital/thesaurus/synonyms
ChicagoSmart Define. 2015. "vital thesaurus" https://smartdefine.org/vital/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, vital thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/vital/thesaurus/synonyms>.
MLASmart Define. "vital thesaurus" 2 November 2015. Web. 22 September 2026. <https://smartdefine.org/vital/thesaurus/synonyms>