56 entries under primary topic. ×

2
basal(adjective, important, significant, original, essential)
2
crucial(adjective, important, significant, original, essential)
2
theoretical(adjective, obscure, extraordinary, superior, important)
1
antecedent(adjective, head, beginning, fresh, prime)
1
axiological(adjective, important, significant, original, essential)
1
axiomatic(important, significant, original, basic, vital)
1
bottom(adjective, important, significant, original, essential)
1
bottom-line(important, significant, original, basic, vital)
1
constitutional(adjective, important, significant, original, essential)
1
constitutive(important, significant, original, basic, vital)
1
essential(adjective, simple, rough, important, significant)
1
foundational(adjective, important, significant, original, essential)
1
grass-roots(adjective, important, significant, original, essential)
1
head(adjective, beginning, opening, original, prime)
1
indispensable(adjective, important, significant, original, essential)
1
integral(adjective, important, significant, original, essential)
1
intrinsic(adjective, important, significant, original, essential)
1
major(adjective, important, significant, original, essential)
1
meat-and-potatoes(adjective, important, significant, original, essential)
1
necessary(adjective, important, significant, original, essential)
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APASmart Define. (2015). primordial thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/primordial/thesaurus/synonyms
ChicagoSmart Define. 2015. "primordial thesaurus" https://smartdefine.org/primordial/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, primordial thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/primordial/thesaurus/synonyms>.
MLASmart Define. "primordial thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/primordial/thesaurus/synonyms>