202 entries under fundamental topic. ×

11
needful(adjective, set, important, significant, original)
9
basal(adjective, body, simple, plain, material)
9
capital(adjective, importance, important, prominent, prime)
9
essence(noun, nature, feature, support, action)
9
significant(adjective, importance, big, important, original)
8
absolute(adjective, physical, material, true, basic)
8
congenital(adjective, reasonable, natural, basic)
8
indwelling(adjective, characteristic, natural, basic, intimate)
8
intimate(adjective, characteristic, natural, basic)
8
need(noun, verb, concern, condition, demand)
8
urgent(adjective, severe, big, important, significant)
7
demand(noun, right, concern, want, need)
7
principle(noun, adjective, support, action, drop)
7
rudiment(noun, support, action, drop, part)
7
simple(adjective, hard, severe, rough, plain)
6
desideratum(noun, right, concern, demand, want)
6
heart(noun, support, action, base, importance)
6
native(adjective, characteristic, reasonable, common, ordinary)
6
plain(adjective, simple, pure, straightforward, basic)
6
primitive(adjective, body, simple, plain, material)
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APASmart Define. (2016). essential thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/essential/thesaurus/synonyms
ChicagoSmart Define. 2016. "essential thesaurus" https://smartdefine.org/essential/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, essential thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/essential/thesaurus/synonyms>.
MLASmart Define. "essential thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/essential/thesaurus/synonyms>