135 entries under adjective topic. ×
| extirpative(harmful, injurious, damaging, deadly) | |
| ferocious | |
| formidable | |
| grave | |
| high-flying | |
| huge | |
| impending | |
| inhuman | |
| insalubrious(harmful, unwholesome, poisonous, toxic) | |
| leading | |
| lethiferous(harmful, killing, injurious, damaging) | |
| lost | |
| mephitic | |
| mortiferous(killing, deadly) | |
| nasty | |
| nocuous | |
| pressing | |
| sanguineous | |
| serious | |
| severe |
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| APA | Smart Define. (2015). lethal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/lethal/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "lethal thesaurus" https://smartdefine.org/lethal/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, lethal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/lethal/thesaurus/synonyms>. |
| MLA | Smart Define. "lethal thesaurus" 17 July 2015. Web. 21 September 2026. <https://smartdefine.org/lethal/thesaurus/synonyms> |