102 entries under essential topic. ×

10
outstanding(adjective, great, importance, important, significant)
10
primary(adjective, body, importance, material, big)
10
principal(adjective, body, great, importance, material)
9
central(adjective, important, significant, original)
9
meaningful(adjective, importance, main, extremely significant)
9
needed(adjective, set, right, important, significant)
8
chief(adjective, importance, big, important, significant)
8
major(adjective, great, heavy, important, significant)
8
paramount(adjective, importance, important, significant, original)
8
prime(adjective, body, importance, material, important)
7
decisive(adjective, severe, big, important, significant)
7
life-or-death(adjective, important, critical, fundamental)
6
compelling(adjective, energetic, important, lively, active)
6
compulsory(adjective, set, important, significant)
6
needful(adjective, set, important, significant, original)
6
radical(adjective, great, importance, important, significant)
5
capital(adjective, top, importance, important, serious)
5
exigent(adjective, big, heavy, important, significant)
5
prerequisite(adjective, set, right, important, significant)
5
underlying(adjective, important, significant, original)
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APASmart Define. (2015). vital thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/vital/thesaurus/synonyms
ChicagoSmart Define. 2015. "vital thesaurus" https://smartdefine.org/vital/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, vital thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/vital/thesaurus/synonyms>.
MLASmart Define. "vital thesaurus" 2 November 2015. Web. 27 September 2026. <https://smartdefine.org/vital/thesaurus/synonyms>