202 entries under fundamental topic. ×

6
profound(adjective, basic, intimate, secret)
6
quintessential(adjective, characteristic, important, common, ordinary)
5
concealed(adjective, individual, original, basic)
5
connate(adjective, basic, intrinsicality)
5
inmost(adjective, important, significant, basic, intimate)
5
original(adjective, characteristic, body, simple, plain)
4
particular(noun, adjective, drop, material, element)
4
clear(adjective, simple, easy, plain, pure)
4
hidden(adjective, individual, original, basic)
4
keystone(noun, support, action, base, importance)
4
nitty-gritty(noun, adjective, important, critical, essence)
4
obligation(noun, right, want, need, certainty)
4
want(noun, verb, right, concern, demand)
3
axiom(noun, support, action, base, beginning)
3
base(noun, support, action, part, beginning)
3
decisive(adjective, severe, big, important, significant)
3
foundational(adjective, simple, plain, pure, important)
3
gravamen(importance, shorts, undercarriage)
3
ideal(adjective, basic)
3
immanent(adjective, characteristic, natural, basic)
10 years ago|34k views|share |citing 
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>