5
native(adjective, innate, inherent)
5
severe(adjective, severe)
5
single(adjective, simple, whole, united)
5
standard(noun, adjective, law, regulation, order)
5
staple(adjective, essential, basic, main, chief)
5
unadorned(adjective, pure)
5
uniform(adjective, simple, whole, united)
4
atomic(adjective, simple, pure, whole, united)
4
axiomatic(adjective, important, original, basic, primary)
4
bedrock(noun, support, action, cause, start)
4
beginning(noun, adjective, start, simple, plain)
4
belief(noun, regulation, rule, attitude, statement)
4
capital(adjective, important, essential, prime, vital)
4
coherent(adjective, simple, whole, united)
4
complete(adjective, united)
4
dominant(adjective, top, important, significant, usual)
4
focal(adjective, important, significant, key, main)
4
groundwork(noun, cause, base, quick, source)
4
holistic(adjective, simple, whole, united)
4
inborn(adjective, intrinsicality)
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APASmart Define. (2016). fundamental thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms
ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>