97 entries under basic topic. ×

1
name(important, essential, critical, fundamental)
1
name-of-the-game(important, essential, critical, fundamental)
1
needed(adjective, important, significant, capital, essential)
1
nitty-gritty(adjective, important, original, essential, critical)
1
nub(adjective, original, absolute, fundamental)
1
prerequisite(adjective, important, significant, capital, essential)
1
quintessential(adjective, significant, essential, vital)
1
required(adjective, important, significant, capital, essential)
1
structural(important, significant, original, vital)
1
substratal(adjective, important, significant, original, essential)
1
substrative(important, significant, original, vital)
1
supporting(important, significant, original, vital)
1
sustaining(important, significant, original, vital)
1
theoretical(important, significant, original, vital)
1
underived(important, significant, original, vital)
1
underlined(important, essential, critical, fundamental)
1
urgent(adjective, important, significant, essential, critical)
1
wanted(adjective, important, significant, capital, essential)
0
all-important(adjective, significant, essential, vital)
0
binding(adjective, significant, essential, vital)
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APASmart Define. (2015). cardinal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/cardinal/thesaurus/synonyms
ChicagoSmart Define. 2015. "cardinal thesaurus" https://smartdefine.org/cardinal/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, cardinal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/cardinal/thesaurus/synonyms>.
MLASmart Define. "cardinal thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/cardinal/thesaurus/synonyms>