Synonyms|285Antonyms|76|Broader|4Narrower|0Related|306

74 entries under essential topic. ×

6
critical(adjective, important, original, serious)
5
necessitous(adjective, important, capital, vital)
5
of the essence(expression, adjective, idiom, important)
5
pressing(adjective, important, significant, critical)
5
primary(adjective, important, significant, original, serious)
4
integral(adjective, important, original, critical)
3
binding(adjective, significant, basic, vital)
3
called for(verb, expression, phrasal verb, requirement)
3
inherent(adjective, characteristic, basic, fundamental)
3
life-or-death(adjective, important, critical, basic)
3
paramount(adjective, important, significant, original, serious)
3
principal(adjective, important, significant, original, serious)
3
underlying(adjective, important, original, basic)
2
basal(adjective, important, significant, original)
2
bottom-line(adjective, important, significant, original)
2
chief(adjective, important, significant, serious, capital)
2
elemental(adjective, important, significant, original)
2
elementary(adjective, characteristic, important, significant, natural)
2
exigent(adjective, important, significant, serious)
2
intrinsic(adjective, characteristic, important, significant, natural)
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APASmart Define. (2015). indispensable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/indispensable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indispensable thesaurus" https://smartdefine.org/indispensable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, indispensable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/indispensable/thesaurus/synonyms>.
MLASmart Define. "indispensable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/indispensable/thesaurus/synonyms>