208 entries under basic topic. ×

49
vital(adjective, body, severe, importance, material)
48
fundamental(noun, adjective, support, action, characteristic)
41
necessary(noun, adjective, body, material, big)
40
important(adjective, severe, importance, big, significant)
37
primary(adjective, body, simple, plain, importance)
33
intrinsic(adjective, characteristic, physical, material, important)
31
requisite(noun, adjective, right, condition, important)
30
crucial(adjective, severe, big, important, significant)
30
indispensable(adjective, characteristic, important, significant, original)
28
key(adjective, importance, valuable, fundamental)
27
inherent(adjective, characteristic, body, reasonable, material)
26
main(adjective, importance, important, significant)
26
principal(adjective, body, importance, material, big)
24
imperative(noun, adjective, form, fix, pass)
24
required(adjective, important, significant, capital, critical)
23
elementary(adjective, characteristic, simple, plain, pure)
22
organic(adjective, important, significant, natural, animate)
21
elemental(adjective, characteristic, body, simple, plain)
21
prime(adjective, body, importance, material, pure)
20
momentous(adjective, feature, state, characteristic, importance)
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APASmart Define. (2016). essential thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/essential/thesaurus/synonyms
ChicagoSmart Define. 2016. "essential thesaurus" https://smartdefine.org/essential/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, essential thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/essential/thesaurus/synonyms>.
MLASmart Define. "essential thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/essential/thesaurus/synonyms>