10
internal(adjective, characteristic, natural, basic, intimate)
10
of the essence(expression, adjective, idiom, important, vital)
10
relevant(adjective, importance, big, significant, substantial)
9
basal(adjective, body, simple, plain, material)
9
big-league(adjective, importance, valuable, main, notable)
9
capital(adjective, importance, important, prominent, prime)
9
compulsory(adjective, set, important, significant, critical)
9
condition(noun, position, need, shape, situation)
9
earnest(adjective, importance, valuable, main, notable)
9
essence(noun, nature, feature, support, action)
9
fateful(adjective, importance, valuable, main, notable)
9
influential(adjective, importance, big, important, significant)
9
interior(adjective, important, significant, basic, main)
9
outstanding(adjective, importance, important, significant, valuable)
9
significant(adjective, importance, big, important, original)
8
big(adjective, importance, important, significant, substantial)
8
absolute(adjective, physical, material, true, basic)
8
actual(adjective, physical, material, true, existence)
8
congenital(adjective, reasonable, natural, basic, fundamental)
8
considerable(adjective, importance, big, significant, substantial)
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APASmart Define. (2016). essential thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/essential/thesaurus/synonyms
ChicagoSmart Define. 2016. "essential thesaurus" https://smartdefine.org/essential/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, essential thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/essential/thesaurus/synonyms>.
MLASmart Define. "essential thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/essential/thesaurus/synonyms>