98 entries under adjective topic. ×

1
cardinal(important, significant, original, essential)
1
central(important, significant, original, essential)
1
clear(simple, straightforward, basic, fundamental)
1
cold(basic, absolute, fundamental, key)
1
complete(basic, absolute, fundamental, key)
1
congenital(basic, absolute, fundamental, key)
1
connate(basic, absolute, fundamental, key)
1
constitutional(important, significant, original, essential)
1
constitutive(important, significant, original, basic)
1
crucial(important, significant, original, essential)
1
deep-seated(original, essential, basic, absolute)
1
duck soup(expression, simple, straightforward, basic)
1
easy(simple, straightforward, basic, fundamental)
1
facile(simple, straightforward, basic, fundamental)
1
first(rough, important, significant, fresh)
1
grass-roots(important, significant, original, essential)
1
ideal(basic, absolute, fundamental, key)
1
inborn(basic, absolute, fundamental, key)
1
inbred(basic, absolute, fundamental, key)
1
indispensable(important, significant, original, essential)
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APASmart Define. (2011). substratal thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substratal/thesaurus/synonyms
ChicagoSmart Define. 2011. "substratal thesaurus" https://smartdefine.org/substratal/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2011, substratal thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substratal/thesaurus/synonyms>.
MLASmart Define. "substratal thesaurus" 24 May 2011. Web. 23 September 2026. <https://smartdefine.org/substratal/thesaurus/synonyms>