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
Murderous is a synonym for lethal in deadly topic. In some cases you can use "Murderous" instead an adjective "Lethal", when it comes to topics like fatal, pestilential. popular alternative
Nearby Word: lethality
Murderous
Murderous adjective - Likely to cause or capable of causing death.
Usage example: braved murderous machine-gun fire to capture the hill from the enemy
Lethal is a synonym for murderous in deadly topic. You can use "Lethal" instead an adjective "Murderous", if it concerns topics such as difficult, fatal, pestilential. popular alternative
Mutual synonyms
Both words in one sentence
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Irony: Why is it that the humans' tests are so much more lethal than the ones made by the murderous AI?
Source: Video Game / Portal: Prelude -
Murderous Mask: The lethal masks that Cochran plans to use to murder millions of children.
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If Lincoln performs lethal takedowns, kills targets, and executes his opponents then he'll be more murderous in cutscenes.
Source: Video Game / Mafia III
Cite this Source
Murderous and Lethal. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/lethal/murderous
Lethal & Murderous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/lethal/murderous>.
Murderous or Lethal. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/lethal/murderous.
Google Ngram Viewer shows how "lethal" and "murderous" have occurred on timeline