136 entries under significant topic. ×

11
weighty(adjective, great, tough, severe, big)
10
compelling(adjective, important, serious, essential)
10
fateful(adjective, severe, important, lively)
10
indispensable(adjective, important, original, serious)
9
consequential(adjective, big, heavy, important, lively)
7
all-important(adjective, important, serious, essential)
6
desperate(adjective, severe, intense, important)
6
cardinal(adjective, important, original, essential)
6
dire(adjective, severe, important, extreme)
6
heavy(adjective, great, tough, severe, extraordinary)
6
primary(adjective, big, important, original)
6
principal(adjective, great, big, important)
6
requisite(adjective, important, original, essential)
5
exigent(adjective, big, heavy, important)
5
great(extraordinary, heavy, important, extreme)
4
chief(adjective, great, big, heavy, important)
4
determining(adjective, big, important, substantial)
4
meaningful(adjective, great, severe, important)
4
notable(adjective, great, heavy, important, lively)
4
portentous(adjective, big, heavy, substantial)
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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>