46 entries under important topic. ×

15
fundamental(adjective, clear, simple, plain, pure)
8
basic(adjective, simple, base, pure)
7
basal(adjective, simple, base, pure)
7
elementary(adjective, simple, pure, straightforward)
7
radical(adjective, base, last, original)
7
underlying(adjective, simple, base, straightforward)
6
bottom(adjective, significant, original, basic)
6
primary(adjective, simple, base, pure)
4
elemental(adjective, simple, pure, straightforward)
4
original(adjective, simple, opening, straightforward)
4
prime(adjective, pure, significant, original)
3
essential(adjective, simple, plain, pure)
3
primitive(adjective, simple, straightforward, original)
3
rudimentary(adjective, simple, straightforward, original)
2
bottom-line(adjective, significant, original, essential)
2
meat-and-potatoes(adjective, base, significant, fresh)
2
substratal(adjective, simple, plain, significant)
1
axiological(adjective, significant, original, essential)
1
axiomatic(adjective, significant, original, basic)
1
cardinal(adjective, significant, original, basic)
<123>
11 years ago|3k views|share |citing 
APASmart Define. (2015). foundational thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/foundational/thesaurus/synonyms
ChicagoSmart Define. 2015. "foundational thesaurus" https://smartdefine.org/foundational/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, foundational thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/foundational/thesaurus/synonyms>.
MLASmart Define. "foundational thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/foundational/thesaurus/synonyms>