203 entries under basic topic. ×

13
main(adjective, important, significant, usual, essential)
12
first(adjective, order, violent, important, opening)
12
original(adjective, characteristic, body, simple, plain)
11
axiom(noun, law, support, regulation, action)
11
basis(noun, law, regulation, action, drop)
11
indispensable(adjective, characteristic, important, significant, natural)
11
principle(noun, law, support, action, drop)
11
requisite(noun, adjective, important, need, significant)
11
simple(adjective, top, pure, straightforward, whole)
10
important(adjective, significant, original, essential, critical)
10
rudiment(noun, support, action, part, base)
9
bottom(noun, adjective, cause, start, base)
9
constitutional(adjective, important, natural, essential)
9
element(noun, feature, drop, part, concern)
9
law(noun, support, regulation, action, order)
9
primitive(adjective, body, simple, plain, material)
9
primordial(adjective, violent, important, head, beginning)
9
rule(noun, law, regulation, part, attitude)
8
component(noun, adjective, drop, part, material)
8
constituent(noun, adjective, drop, part, material)
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APASmart Define. (2016). fundamental thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms
ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>