63 entries under prime topic. ×

48
basic(noun, adjective, characteristic, drop, part)
42
essential(noun, adjective, support, action, characteristic)
31
elementary(adjective, characteristic, simple, plain, pure)
30
primary(adjective, body, simple, plain, material)
20
cardinal(noun, adjective, important, head, significant)
17
principal(noun, adjective, body, material, important)
16
key(noun, adjective, important, head, significant)
16
rudimentary(adjective, simple, plain, important, head)
13
main(adjective, important, significant, usual, essential)
12
first(adjective, order, violent, important, opening)
12
original(adjective, characteristic, body, simple, plain)
9
primitive(adjective, body, simple, plain, material)
9
primordial(adjective, violent, important, head, beginning)
7
chief(adjective, important, significant, essential, basic)
7
initial(adjective, start, simple, plain, head)
7
paramount(adjective, important, significant, original, essential)
6
aboriginal(adjective, harsh, violent, pure, head)
6
constitutive(adjective, important, capital, essential, critical)
6
major(adjective, important, significant, original, essential)
5
introductory(adjective, start, simple, plain, head)
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APASmart Define. (2016). fundamental thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms
ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>