66 entries under great topic. ×

65
important(adjective, tough, severe, extraordinary)
60
critical(adjective, severe, extraordinary, big)
46
vital(adjective, severe, big, heavy)
25
momentous(adjective, tough, severe, extraordinary)
25
serious(adjective, severe, extraordinary, big)
19
significant(adjective, tough, severe, extraordinary)
17
decisive(adjective, severe, extraordinary, big)
17
grave(adjective, tough, severe, big)
16
major(adjective, tough, severe, heavy)
11
weighty(adjective, tough, severe, big)
6
heavy(adjective, tough, severe, extraordinary)
6
principal(adjective, big, important, significant)
4
chief(adjective, big, heavy, important)
4
meaningful(adjective, severe, important, significant)
4
notable(adjective, heavy, important, lively)
3
distinguished(adjective, extraordinary, important, significant)
3
heavyweight(adjective, big, heavy, important)
3
historic(extraordinary, important, lively, significant)
3
radical(adjective, important, significant, original)
2
dangerous(adjective, severe, significant, serious)
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APASmart Define. (2016). crucial thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms
ChicagoSmart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, crucial thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>.
MLASmart Define. "crucial thesaurus" 11 March 2016. Web. 30 September 2026. <https://smartdefine.org/crucial/thesaurus/synonyms>