69 entries under severe topic. ×

65
important(adjective, great, tough, extraordinary)
60
critical(adjective, great, extraordinary, big)
46
vital(adjective, great, big, heavy)
40
essential(adjective, big, important, significant)
29
urgent(adjective, tough, big, heavy)
25
momentous(adjective, great, tough, extraordinary)
25
serious(adjective, great, extraordinary, big)
19
significant(adjective, great, tough, extraordinary)
17
decisive(adjective, great, extraordinary, big)
17
grave(adjective, great, tough, big)
16
major(adjective, great, tough, heavy)
16
pressing(adjective, tough, big, heavy)
11
acute(adjective, heavy, important, significant)
11
weighty(adjective, great, tough, big)
10
fateful(adjective, important, lively, significant)
6
desperate(adjective, intense, important, significant)
6
dire(adjective, important, significant, extreme)
6
heavy(adjective, great, tough, extraordinary)
4
meaningful(adjective, great, important, significant)
2
dangerous(adjective, great, significant, serious)
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>