47 entries under vital topic. ×

4
key(adjective, important, significant, original, essential)
4
necessary(adjective, important, significant, original, essential)
3
integral(adjective, important, significant, original, essential)
2
chief(adjective, top, essential, prime)
2
constitutive(important, original, essential, basic)
2
first(adjective, rough, important, significant, original)
2
important(adjective, significant, original, essential, basic)
2
substratal(adjective, simple, plain, important, significant)
1
axiological(adjective, important, significant, original, essential)
1
axiomatic(important, original, basic, primary)
1
bottom-line(adjective, important, original, basic)
1
grass-roots(adjective, important, significant, original, essential)
1
leading(adjective, top, essential, prime)
1
major(adjective, important, significant, original, essential)
1
meat-and-potatoes(adjective, base, important, significant, last)
1
paramount(adjective, important, significant, original, essential)
1
primordial(adjective, rough, important, significant, original)
1
requisite(adjective, important, significant, original, essential)
1
significant(adjective, important, original, essential, basic)
1
structural(important, original, basic, primary)
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APASmart Define. (2015). underlying thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/underlying/thesaurus/synonyms
ChicagoSmart Define. 2015. "underlying thesaurus" https://smartdefine.org/underlying/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, underlying thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/underlying/thesaurus/synonyms>.
MLASmart Define. "underlying thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/underlying/thesaurus/synonyms>