- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
66 entries under serious topic. ×
| instant(adjective, important, essential, critical) | |
| major-league(adjective, great, extraordinary, important, outstanding) | |
| outstanding(great, important, lively, significant) | |
| capital(adjective, important, essential, critical) | |
| clamant(adjective, important, essential, critical) | |
| demanding(tough, severe, important, painful) | |
| earth-shaking(adjective, important, significant, critical) | |
| earth-shattering(important, significant, critical, historic) | |
| exacting(tough, severe, important, painful) | |
| grievous(adjective, great, tough, severe, heavy) | |
| hazardous(adjective, heavy, significant, vital) | |
| importunate(adjective, big, important, significant, substantial) | |
| integral(important, significant, essential, critical) | |
| leading(adjective, important, capital, essential) | |
| life and death(expression, idiom, great, heavy, important) | |
| perilous(adjective, heavy, significant, vital) | |
| urgently important(expression, adjective, significant, vital) | |
| wanted(adjective, important, significant, capital) | |
| afflictive(adjective, severe, heavy, acute) | |
| overshadowing(great, important) |
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| APA | Smart Define. (2016). crucial thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2016, crucial thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>. |
| MLA | Smart Define. "crucial thesaurus" 11 March 2016. Web. 1 October 2026. <https://smartdefine.org/crucial/thesaurus/synonyms> |