Deadly
Deadly adjective - Likely to cause or capable of causing death.
Usage example: the doctors were alarmed about the outbreak of the deadly new virus
Toxic is a synonym for deadly in noxious topic. In some cases you can use "Toxic" instead an adjective "Deadly", when it comes to topics like harmful, causing end of life. popular alternative
Nearby Word: dead
Toxic
Toxic adjective - Containing or contaminated with a substance capable of injuring or killing a living thing.
Usage example: certain plants are toxic if eaten
Deadly is a synonym for toxic in poisonous topic. You can use "Deadly" instead an adjective "Toxic", if it concerns topics such as fatal, harmful. popular alternative
Mutual synonyms
Both words in one sentence
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Azmodan: He warns his minions that there is nothing more toxic or deadly than a Nephalem child.
Source: Video Game / Heroes of the Storm -
The Mountain Men, who haven't developed such superhuman tolerance, find the Earth's surface just as toxic and deadly as the Sky People feared.
Source: Polluted Wasteland -
Not only are the normally-harmless bodily secretions of diaboli deadly poisonous to humans, but human saliva is equally toxic to them.
Source: No Biochemical Barriers
Cite this Source
Toxic and Deadly. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deadly/toxic
Deadly & Toxic. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deadly/toxic>.
Toxic or Deadly. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deadly/toxic.
Google Ngram Viewer shows how "deadly" and "toxic" have occurred on timeline