51 entries under primary topic. ×

3
primordial(adjective, important, head, significant, beginning)
3
vital(adjective, top, important, significant, original)
2
constitutive(important, significant, original, basic, vital)
2
deep(adjective, original, basic)
2
important(adjective, significant, original, basic, vital)
2
indispensable(adjective, characteristic, important, significant, natural)
2
major(important, significant, original, basic, vital)
2
substratal(adjective, simple, plain, important, significant)
1
axiological(important, significant, original, basic, vital)
1
axiomatic(important, significant, original, basic, vital)
1
bottom-line(adjective, important, significant, original, essential)
1
deep-seated(adjective, characteristic, original, essential, basic)
1
grass-roots(important, significant, original, basic, vital)
1
head(adjective, beginning, opening, original, prime)
1
meat-and-potatoes(important, significant, original, basic, vital)
1
nitty-gritty(adjective, original, basic, absolute, fundamental)
1
nub(adjective, original, basic, absolute, fundamental)
1
paramount(adjective, important, significant, original, essential)
1
requisite(adjective, important, significant, original, essential)
1
root(adjective, original, basic, fundamental)
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APASmart Define. (2015). elementary thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/elementary/thesaurus/synonyms
ChicagoSmart Define. 2015. "elementary thesaurus" https://smartdefine.org/elementary/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, elementary thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/elementary/thesaurus/synonyms>.
MLASmart Define. "elementary thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/elementary/thesaurus/synonyms>