Lethal
Lethal adjective - Likely to cause or capable of causing death.
Usage example: we were lucky that the snake's venom wasn't lethal, and our friend turned out to be all right
Pernicious is a synonym for lethal in deadly topic. In some cases you can use "Pernicious" instead an adjective "Lethal", when it comes to topics like dangerous, noxious, pestilential. popular alternative
Nearby Word: lethality
Pernicious
Pernicious adjective - Causing or capable of causing harm.
Usage example: the pernicious effects of illegal narcotics on society
Lethal is a synonym for pernicious in bad topic. You can use "Lethal" instead an adjective "Pernicious", if it concerns topics such as noxious, harmful, pestilential. popular alternative
Nearby Word: perniciously
Mutual synonyms
Related pairs
Cite this Source
Pernicious and Lethal. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/lethal/pernicious
Lethal & Pernicious. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/lethal/pernicious>.
Pernicious or Lethal. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/lethal/pernicious.
Google Ngram Viewer shows how "lethal" and "pernicious" have occurred on timeline