2
essence
2
eventful(adjective, great, extraordinary, important, lively)
2
exceptional(great, big, heavy, significant, substantial)
2
fatal(adjective, important, critical)
2
fierce
2
final(adjective, significant, last, definite, critical)
2
genetic
2
immense(tough, severe, painful, problematic, trying)
2
influential(adjective, great, big, important, powerful)
2
instant(adjective, important, serious, essential, critical)
2
landmark
2
life changing
2
major-league(adjective, great, extraordinary, important, outstanding)
2
mandatory(adjective, significant, essential, basic, vital)
2
material(big, heavy, important, significant, substantial)
2
original(important, significant, basic, vital, fundamental)
2
outstanding(great, important, lively, significant, serious)
2
ponderous(big, heavy, significant, substantial, valuable)
2
precise
2
primitive(adjective, important, significant, original, essential)
10 years ago|16k views|share |citing 
APASmart Define. (2016). crucial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms
ChicagoSmart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, crucial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>.
MLASmart Define. "crucial thesaurus" 11 March 2016. Web. 28 September 2026. <https://smartdefine.org/crucial/thesaurus/synonyms>