88 entries under vital topic. ×

14
primitive(adjective, body, cause, start, simple)
14
underlying(adjective, simple, plain, base, important)
13
basal(adjective, body, simple, lead, plain)
12
rudimentary(adjective, simple, plain, important, head)
11
radical(adjective, cause, base, importance, important)
10
primordial(adjective, cause, start, violent, important)
6
constitutional(adjective, body, material, important, significant)
6
crucial(adjective, big, important, significant, original)
6
foundational(adjective, simple, plain, base, pure)
5
great(adjective, important, significant, imperative)
5
momentous(adjective, superior, big, unusual, important)
5
significant(adjective, superior, big, unusual, important)
4
constitutive(important, original, serious, basic, prime)
4
indispensable(adjective, important, significant, original, serious)
4
material(adjective, body, big, important, significant)
4
necessary(adjective, body, material, big, important)
4
underived(adjective, rough, important, significant, original)
3
big(important, significant, substantial, large, serious)
3
bottom(adjective, important, significant, original, essential)
3
critical(adjective, big, important, significant, substantial)
10 years ago|24k views|share |citing 
APASmart Define. (2016). primary thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/primary/thesaurus/synonyms
ChicagoSmart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, primary thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>.
MLASmart Define. "primary thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms>