40 entries under simple topic. ×

16
fundamental(adjective, body, plain, material)
14
elementary(adjective, start, plain, pure)
14
primary(adjective, body, lead, plain)
13
essential(adjective, body, plain, material)
12
basic(adjective, body, start, plain)
12
elemental(adjective, body, plain, material)
8
underlying(adjective, plain, base, important)
6
beginning(noun, adjective, start, easy)
6
foundational(adjective, base, pure, important)
6
rudimentary(adjective, start, important, straightforward)
5
rudimental(adjective, start, elementary)
4
original(adjective, important, natural, straightforward)
3
primitive(adjective, body, plain, material)
2
abecedarian(straightforward, basic, fundamental, uncomplicated)
2
clear(adjective, pure, straightforward, basic)
2
easy(adjective, straightforward, basic, uncomplicated)
2
embryonic(basic, fundamental, elementary)
2
initial(adjective, easy, straightforward, basic)
2
plain(adjective, pure, straightforward, basic)
2
substratal(adjective, plain, important, 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>