110 entries under basic topic. ×

16
fundamental(adjective, body, simple, plain, material)
16
organic(adjective, important, natural, original)
14
elementary(adjective, start, simple, plain, pure)
14
primary(adjective, body, simple, lead, plain)
13
essential(adjective, body, simple, plain, material)
12
elemental(adjective, body, simple, plain, material)
10
radical(adjective, base, important, significant, last)
8
underlying(adjective, simple, plain, base, important)
6
beginning(noun, adjective, start, simple, easy)
6
foundational(adjective, simple, base, pure, important)
6
rudimentary(adjective, start, simple, important, straightforward)
6
simple(adjective, pure, straightforward, fundamental)
5
bottom(noun, adjective, important, significant, original)
5
cardinal(noun, adjective, lead, important, head)
5
prime(adjective, body, lead, material, pure)
4
constitutive(important, original, serious, prime)
4
necessary(adjective, body, material, important, significant)
4
original(adjective, simple, important, natural, straightforward)
3
indispensable(adjective, important, significant, original, essential)
3
key(adjective, lead, important, head, significant)
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APASmart Define. (2015). basal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/basal/thesaurus/synonyms
ChicagoSmart Define. 2015. "basal thesaurus" https://smartdefine.org/basal/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, basal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/basal/thesaurus/synonyms>.
MLASmart Define. "basal thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/basal/thesaurus/synonyms>