Synonyms|1.1kAntonyms|182|Broader|18Narrower|25Related|905

203 entries under basic topic. ×

8
critical(adjective, severe, important, significant, original)
8
foundation(noun, law, regulation, part, cause)
8
foundational(adjective, clear, simple, plain, pure)
8
natural(adjective, characteristic, simple, material, essential)
7
chief(adjective, important, significant, essential)
7
cornerstone(noun, part, base, basis)
7
initial(adjective, start, simple, plain, head)
7
paramount(adjective, important, significant, original, essential)
7
significant(adjective, important, original, essential, critical)
7
sine qua non(noun, expression, idiom, part, need)
6
constitutive(adjective, important, capital, essential, critical)
6
core(noun, adjective, support, action, cause)
6
factor(noun, drop, part, material, essential)
6
major(adjective, important, significant, original, essential)
6
necessity(noun, condition, need, essential, essence)
6
plain(adjective, simple, pure, straightforward)
6
theorem(noun, law, support, regulation, action)
6
ultimate(adjective, simple, essential, surface)
5
center(noun, adjective, support, action, cause)
5
heart(noun, support, action, part, cause)
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APASmart Define. (2016). fundamental thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms
ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>