51 entries under primary topic. ×

20
basic(adjective, hard, start, simple, plain)
19
elementary(adjective, start, simple, plain, important)
19
fundamental(adjective, simple, plain, important, head)
18
primitive(adjective, simple, plain, important, coarse)
11
rudimental(adjective, start, simple, coarse, crude)
10
elemental(adjective, simple, plain, important, significant)
10
initial(adjective, simple, plain, head, beginning)
10
underlying(adjective, simple, plain, important, significant)
8
essential(adjective, simple, plain, important, significant)
8
first(adjective, order, important, significant, fresh)
7
basal(adjective, start, simple, plain, important)
6
primordial(adjective, important, head, significant, beginning)
5
cardinal(noun, adjective, important, head, significant)
5
original(adjective, simple, plain, important, head)
5
principal(adjective, important, significant, original, essential)
4
central(adjective, important, significant, original, essential)
4
key(adjective, important, head, significant, beginning)
4
prime(adjective, important, head, significant, beginning)
4
radical(adjective, important, significant, original, essential)
3
crucial(adjective, important, significant, original, essential)
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APASmart Define. (2015). rudimentary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rudimentary/thesaurus/synonyms
ChicagoSmart Define. 2015. "rudimentary thesaurus" https://smartdefine.org/rudimentary/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, rudimentary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rudimentary/thesaurus/synonyms>.
MLASmart Define. "rudimentary thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/rudimentary/thesaurus/synonyms>