- Definitions|1
- Thesaurus|89
- Abbreviations|0
| determining(adjective, important) | |
| earth-shaking(adjective, important) | |
| earth-shattering(adjective, important) | |
| earthshaking | |
| earthshattering | |
| emergency | |
| feller(heavy, acute, crucial) | |
| grievous(adjective, heavy, acute, major, dangerous) | |
| hazardous(adjective, heavy, acute, major, dangerous) | |
| heavy(adjective, acute, dangerous, crucial) | |
| immediate | |
| instant | |
| key | |
| killing(adjective, heavy, acute, major, dangerous) | |
| main | |
| major(adjective, heavy, acute, dangerous, crucial) | |
| needed | |
| needful | |
| no laughing matter | |
| obligatory |
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| APA | Smart Define. (2015). life-and-death thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/life-and-death/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "life-and-death thesaurus" https://smartdefine.org/life-and-death/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, life-and-death thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/life-and-death/thesaurus/synonyms>. |
| MLA | Smart Define. "life-and-death thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/life-and-death/thesaurus/synonyms> |