50 entries under pure topic. ×

15
fundamental(adjective, clear, simple, plain)
8
basic(adjective, simple, base, important)
7
basal(adjective, simple, base, important)
7
elementary(adjective, simple, important, straightforward)
6
primary(adjective, simple, base, important)
4
elemental(adjective, simple, important, straightforward)
4
nascent
4
prime(adjective, important, significant, original)
3
aboriginal
3
essential(adjective, simple, plain, important)
3
formative
3
primal
3
white
2
clear(adjective, simple, straightforward, basic)
2
plain(adjective, simple, straightforward, basic)
2
simple(adjective, straightforward, basic, fundamental)
1
angelic
1
atomic
1
austere
1
bare
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APASmart Define. (2015). foundational thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/foundational/thesaurus/synonyms
ChicagoSmart Define. 2015. "foundational thesaurus" https://smartdefine.org/foundational/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, foundational thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/foundational/thesaurus/synonyms>.
MLASmart Define. "foundational thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/foundational/thesaurus/synonyms>