5
determinant
5
exigent(adjective, big, heavy, important, significant)
5
great(extraordinary, heavy, important, significant, extreme)
5
life-and-death(adjective, heavy, important, serious, critical)
5
life-or-death(important, essential, critical, basic, fundamental)
5
severe(adjective, tough, big, heavy, deep)
5
strategic
4
brisk
4
chief(adjective, great, big, heavy, important)
4
clamorous(adjective, important, serious, essential, critical)
4
climactic(adjective, critical, climax)
4
crying(adjective, important, serious, essential, critical)
4
determining(adjective, big, important, significant, substantial)
4
distressing
4
fine
4
good
4
incisive
4
life-changing
4
meaningful(adjective, great, severe, important, significant)
4
notable(adjective, great, heavy, important, lively)
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APASmart Define. (2016). crucial thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms
ChicagoSmart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, crucial thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>.
MLASmart Define. "crucial thesaurus" 11 March 2016. Web. 29 September 2026. <https://smartdefine.org/crucial/thesaurus/synonyms>