88 entries under vital topic. ×

4
elemental(adjective, important, significant, original, essential)
4
elementary(adjective, top, important, significant, original)
4
first(adjective, top, important, significant, original)
4
indispensable(adjective, important, significant, original, serious)
4
integral(adjective, important, significant, original, essential)
4
primordial(adjective, important, significant, original, basic)
4
signal(important, significant, imperative)
3
salient(adjective, significant, main, middle)
3
necessary(adjective, important, significant, original, critical)
3
rudimentary(adjective, important, significant, original, basic)
3
underlying(adjective, top, important, significant, original)
2
great(significant, imperative)
2
heavy(important, significant, fundamental, imperative)
2
imperative(adjective, important, significant, critical)
2
material(significant, essential, basic, imperative)
2
original(important, significant, basic, primitive)
2
primitive(top, important, significant, original, essential)
2
requisite(adjective, important, significant, original, essential)
2
serious(important, significant, basic, prime)
2
substantial(important, significant, imperative)
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APASmart Define. (2015). central thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/central/thesaurus/synonyms
ChicagoSmart Define. 2015. "central thesaurus" https://smartdefine.org/central/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, central thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/central/thesaurus/synonyms>.
MLASmart Define. "central thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/central/thesaurus/synonyms>