95 entries under basic topic. ×

1
central(adjective, important, significant, original, essential)
1
clear(adjective, simple, straightforward, fundamental)
1
cold(adjective, absolute, fundamental, key)
1
complete(adjective, absolute, fundamental, key)
1
congenital(adjective, absolute, fundamental, key)
1
connate(adjective, absolute, fundamental, key)
1
constitutional(adjective, important, significant, original, essential)
1
constitutive(adjective, important, significant, original)
1
crucial(adjective, important, significant, original, essential)
1
deep-seated(adjective, original, essential, absolute)
1
duck soup(expression, adjective, simple, straightforward)
1
easy(adjective, simple, straightforward, fundamental)
1
facile(adjective, simple, straightforward, fundamental)
1
first(adjective, rough, important, significant, fresh)
1
grass-roots(adjective, important, significant, original, essential)
1
ideal(adjective, absolute, fundamental, key)
1
inborn(adjective, absolute, fundamental, key)
1
inbred(adjective, absolute, fundamental, key)
1
indispensable(adjective, important, significant, original, essential)
1
inherent(adjective, essential, absolute, fundamental)
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APASmart Define. (2011). substratal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/substratal/thesaurus/synonyms
ChicagoSmart Define. 2011. "substratal thesaurus" https://smartdefine.org/substratal/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2011, substratal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/substratal/thesaurus/synonyms>.
MLASmart Define. "substratal thesaurus" 24 May 2011. Web. 21 September 2026. <https://smartdefine.org/substratal/thesaurus/synonyms>