191 entries under adjective topic. ×

2
definitive(significant, last, definite, critical)
2
elemental(important, significant, original, essential)
2
eminent
2
eventful(great, extraordinary, important, lively)
2
fatal(important, critical)
2
final(significant, last, definite, critical)
2
influential(great, big, important, powerful)
2
instant(important, serious, essential, critical)
2
major-league(great, extraordinary, important, outstanding)
2
mandatory(significant, essential, basic, vital)
2
primitive(important, significant, original, essential)
2
salient(big, important, significant, substantial)
2
substantive
1
high(important, prominent, exalted)
1
big-name
1
big-wig
1
bottom(important, significant, original, essential)
1
capital(important, serious, essential, critical)
1
clamant(important, serious, essential, critical)
1
cruciform
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APASmart Define. (2016). crucial thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms
ChicagoSmart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, crucial thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>.
MLASmart Define. "crucial thesaurus" 11 March 2016. Web. 30 September 2026. <https://smartdefine.org/crucial/thesaurus/synonyms>