20 entries under significant topic. ×

38
vital(adjective, natural, basic, important)
37
constitutional(adjective, essential, basic, vital, important)
35
basic(adjective, essential, important, vital)
29
structural(adjective, basic, natural, vital, fundamental)
27
primary(adjective, essential, basic, vital, important)
27
elemental(adjective, essential, basic, vital, important)
27
essential(adjective, basic, vital, important)
23
integral(adjective, basic, vital, total, important)
22
principal(adjective, basic, vital, important)
21
necessary(adjective, essential, basic, vital, important)
20
prime(adjective, basic, vital, important)
18
basal(adjective, basic, essential, vital, important)
16
constitutive(adjective, nature, characteristic, quality, important)
15
original(adjective, basic, vital, important)
13
primitive(adjective, basic, vital, important)
11
important(adjective, essential, basic, vital)
11
intrinsic(adjective, important, essential, basic)
10
radical(adjective, basic, essential, important)
9
elementary(adjective, important, essential, basic)
7
cardinal(adjective, important, essential, basic)
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APASmart Define. (2015). organic thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/organic/thesaurus/synonyms
ChicagoSmart Define. 2015. "organic thesaurus" https://smartdefine.org/organic/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, organic thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/organic/thesaurus/synonyms>.
MLASmart Define. "organic thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/organic/thesaurus/synonyms>