124 entries under significant topic. ×

1
axiological(adjective, important, original, essential)
1
axiomatic(important, original, basic, primary)
1
basal(adjective, body, material, important)
1
bottom(adjective, important, original, essential)
1
bottom-line(adjective, important, original, essential)
1
conclusive(adjective, last, serious, critical)
1
conspicuous
1
desperate(severe, serious, critical, grave)
1
determining(big, important, substantial, serious)
1
dire(adjective, severe, heavy, important)
1
earth-shaking(important, serious, critical, historic)
1
earth-shattering(important, serious, critical, historic)
1
elemental(adjective, body, material, important)
1
esteemed
1
extensive(big, substantial, valuable, imperative)
1
far-reaching(big, important, substantial, valuable)
1
foundational(adjective, important, original, essential)
1
front-page(big, substantial, valuable, imperative)
1
grass-roots(adjective, important, original, essential)
1
hazardous(adjective, heavy, serious, acute)
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APASmart Define. (2015). vital thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/vital/thesaurus/synonyms
ChicagoSmart Define. 2015. "vital thesaurus" https://smartdefine.org/vital/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, vital thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/vital/thesaurus/synonyms>.
MLASmart Define. "vital thesaurus" 2 November 2015. Web. 28 September 2026. <https://smartdefine.org/vital/thesaurus/synonyms>