- Definitions|0
- Thesaurus|96
- Abbreviations|0
| pivotal(important, significant, serious, critical, historic) | |
| significant(important, serious, critical, historic) | |
| substantial(important, significant, historic) | |
| vital(important, significant, serious, critical, historic) | |
| weighty(important, significant, historic) | |
| adverse | |
| afflictive | |
| all-important(adjective, important, serious, critical, earthshaking) | |
| appalling | |
| astonishing | |
| blighting | |
| calamitous | |
| cataclysmic | |
| catastrophic | |
| considerable(important, significant, historic) | |
| crazily | |
| deadly | |
| decisive(important, significant, historic) | |
| deplorable | |
| devastating |
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| APA | Smart Define. (2013). earth-shattering thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/earth-shattering/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "earth-shattering thesaurus" https://smartdefine.org/earth-shattering/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2013, earth-shattering thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/earth-shattering/thesaurus/synonyms>. |
| MLA | Smart Define. "earth-shattering thesaurus" 17 June 2013. Web. 28 September 2026. <https://smartdefine.org/earth-shattering/thesaurus/synonyms> |