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

217 entries under essential topic. ×

2
axiological(adjective, important, original, basic)
2
bottom-line(adjective, important, significant, original)
2
cause(noun, support, regulation, action, start)
2
coal and ice(noun, expression, idiom, part, important)
2
crux(noun, support, action, cause, start)
2
desideratum(noun, concern, demand, need)
2
footing(noun, support, action, cause, start)
2
foremost(adjective, important, significant, original)
2
genuine(adjective, natural, basic, first)
2
grass-roots(adjective, important, original, basic)
2
heavy(important, critical, basic, key)
2
life-or-death(important, critical, basic, key)
2
momentous(adjective, important, significant, substantial, serious)
2
needed(adjective, important, significant, capital)
2
nucleus(noun, support, action, cause, start)
2
ruling(noun, adjective, law, regulation, important)
2
substratal(adjective, clear, simple, plain, important)
2
substrative(adjective, important, original, basic)
2
substratum(noun, support, action, cause, start)
2
underpinning(noun, support, action, cause, start)
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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>