102 entries under essential topic. ×

4
constitutional(adjective, body, material, important, significant)
4
mandatory(adjective, set, significant, basic)
4
obligatory(adjective, important, significant, critical)
3
burning(adjective, important, serious, critical)
3
dominant(adjective, top, important, prime)
3
elementary(adjective, top, important, significant, original)
3
foremost(adjective, importance, big, important, significant)
3
heavy(adjective, informal, big, important, significant)
3
leading(adjective, top, importance, important, serious)
3
of the essence(expression, adjective, idiom, important)
3
overruling(adjective, importance, serious, basic)
2
acute(adjective, severe, heavy, important, significant)
2
all-important(adjective, important, significant, serious)
2
called for(expression, necessary, obligatory, compulsory)
2
first(adjective, top, important, significant, original)
2
name(adjective, important, fundamental, renowned)
2
pre-eminent(adjective, renowned, meritable, central)
2
primitive(adjective, body, material, important, significant)
2
quintessential(adjective, important, significant, basic)
2
rudimentary(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>