9
essential(adjective, important, vital, necessary)
6
crucial
5
indispensable(adjective, important, essential, vital, necessary)
4
all-important
3
requisite(adjective, essential, necessary)
3
vital(adjective, important, essential, necessary)
2
all important
2
fundamental
2
imperative(adjective, important, essential, vital, necessary)
2
necessary(adjective, important, essential, vital)
2
needful(adjective, essential, necessary)
2
required(adjective, essential, necessary)
1
ab ovo
1
basal
1
basic
1
compelling
1
constituent
1
demanded
1
elemental
1
elementary
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APASmart Define. (2015). of the essence thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/of_the_essence/thesaurus/synonyms
ChicagoSmart Define. 2015. "of the essence thesaurus" https://smartdefine.org/of_the_essence/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, of the essence thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/of_the_essence/thesaurus/synonyms>.
MLASmart Define. "of the essence thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/of_the_essence/thesaurus/synonyms>