68 entries under adjective topic. ×

1
earliest(simple, basic, authentic, first)
1
early(simple, basic, authentic, first)
1
elemental(important, significant, original, essential)
1
embryonic(authentic, first, previous, initial)
1
essential(simple, rough, important, significant)
1
first-hand(authentic, first, previous, smallish)
1
foundational(important, significant, fresh, original)
1
grass-roots(important, significant, original, essential)
1
inceptive(authentic, first, previous, smallish)
1
indispensable(important, significant, original, essential)
1
infant(authentic, first, previous, smallish)
1
initial(authentic, first, previous, smallish)
1
integral(important, significant, original, essential)
1
intrinsic(important, significant, original, essential)
1
introductory(authentic, first, previous, initial)
1
key(important, significant, original, essential)
1
major(important, significant, original, essential)
1
meat-and-potatoes(important, significant, fresh, original)
1
necessary(important, significant, original, essential)
1
paramount(important, significant, original, essential)
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APASmart Define. (2015). underived thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/underived/thesaurus/synonyms
ChicagoSmart Define. 2015. "underived thesaurus" https://smartdefine.org/underived/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, underived thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/underived/thesaurus/synonyms>.
MLASmart Define. "underived thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/underived/thesaurus/synonyms>