62 entries under fundamental topic. ×

2
crucial(adjective, important, significant, original, essential)
2
embryonic(simple, basic, elementary)
2
initial(adjective, simple, easy, straightforward, basic)
2
material(adjective, body, basic, absolute)
2
substratal(adjective, simple, plain, important, significant)
1
bottom-line(adjective, important, significant, original, essential)
1
deep-seated(adjective, original, essential, basic, absolute)
1
inherent(adjective, body, material, natural, animate)
1
innate(adjective, body, material, natural, animate)
1
intrinsic(adjective, important, significant, original, essential)
1
introductory(adjective, simple, straightforward, basic)
1
larval(simple, basic, elementary)
1
meat and potatoes(expression, adjective, idiom, simple, plain)
1
nitty-gritty(adjective, original, basic, absolute)
1
nub(adjective, original, basic, absolute)
1
root(noun, adjective, original, basic)
1
simplest(simple, straightforward, basic, uncomplicated)
1
uncompleted(simple, basic, elementary)
1
vestigial(simple, basic, elementary)
1
vital(adjective, body, material, important, significant)
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APASmart Define. (2015). basal thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/basal/thesaurus/synonyms
ChicagoSmart Define. 2015. "basal thesaurus" https://smartdefine.org/basal/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, basal thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/basal/thesaurus/synonyms>.
MLASmart Define. "basal thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/basal/thesaurus/synonyms>