3
rudimentary(adjective, important, significant, original, basic)
3
seminal(adjective, generative)
3
symbiotic(useful, beneficial, advantageous)
2
dangerous(adjective, great, severe, significant, serious)
2
aboriginal
2
accessible(useful, running, beneficial, working, advantageous)
2
basal(adjective, important, significant, original, essential)
2
big(heavy, important, significant, substantial, valuable)
2
bottom-line(adjective, important, significant, original, essential)
2
burning(adjective, important, serious, essential, critical)
2
categorical
2
charged
2
compulsory(adjective, important, significant, essential, critical)
2
considerable(adjective, big, heavy, important, powerful)
2
constitutional(adjective, important, significant, original, basic)
2
critic
2
definitive(adjective, significant, last, definite, critical)
2
dominant
2
elemental(adjective, important, significant, original, essential)
2
eminent(adjective, important)
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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>