74 entries under vital topic. ×

1
grass-roots(adjective, important, significant, original, essential)
1
heavy(adjective, great, tough, severe, important)
1
indispensable(adjective, important, significant, original, essential)
1
integral(adjective, important, significant, original, essential)
1
intrinsic(adjective, important, significant, original, essential)
1
meat-and-potatoes(adjective, important, significant, original, essential)
1
menacing(adjective, tough, severe, unpleasant, important)
1
necessary(adjective, important, significant, original, essential)
1
original(adjective, important, significant, essential, basic)
1
primitive(adjective, important, significant, original, essential)
1
primordial(adjective, important, significant, original, essential)
1
requisite(adjective, important, significant, original, essential)
1
rudimentary(adjective, important, significant, original, essential)
1
structural(important, significant, original, basic)
1
substratal(adjective, important, significant, original, essential)
1
substrative(adjective, important, significant, original, essential)
1
supporting(adjective, important, significant, original, essential)
1
sustaining(adjective, important, significant, original, essential)
1
theoretical(adjective, important, significant, original, essential)
1
threatening(adjective, tough, severe, unpleasant, heavy)
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APASmart Define. (2015). major thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/major/thesaurus/synonyms
ChicagoSmart Define. 2015. "major thesaurus" https://smartdefine.org/major/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, major thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/major/thesaurus/synonyms>.
MLASmart Define. "major thesaurus" 6 July 2015. Web. 29 September 2026. <https://smartdefine.org/major/thesaurus/synonyms>