1
foremost(important, significant, capital, essential, vital)
1
foundational(important, significant, original, basic, vital)
1
four-star(great, heavy)
1
front-page(great, big, heavy, significant, substantial)
1
galling(tough, severe, painful, problematic, trying)
1
game-changing(adjective, change, potential)
1
game changing(change, outcome, potential)
1
gargantuan(tough, severe, painful, problematic, trying)
1
generative
1
germinal
1
grass-roots(important, significant, original, basic, vital)
1
graver
1
grievous(adjective, great, tough, severe, heavy)
1
hard-won(tough, severe, painful, problematic, trying)
1
hazardous(adjective, heavy, significant, serious, vital)
1
helpful(adjective, useful, beneficial, advantageous, beneficent)
1
herculean(tough, severe, painful, problematic, trying)
1
high-power(great, heavy)
1
high-powered(adjective, important)
1
high-pressure
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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>