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
Noxious is a synonym for deadly in help topic. In some cases you can use "Noxious" instead an adjective "Deadly", when it comes to topics like foul, poisonous, pernicious, lethal. popular alternative
Nearby Word: dead
Noxious
Noxious adjective - Causing or capable of causing harm.
Usage example: noxious smog that for years has been encrusting the historic cathedral with soot
Deadly is a synonym for noxious in poisonous topic. You can use "Deadly" instead an adjective "Noxious", if it concerns topics such as harmful, help, foul, pernicious. popular alternative
Nearby Words: noxiousness, noxiously
Mutual synonyms
Related pairs
Both words in one sentence
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Deadly Gas - Used as a trap in the pyramids and a plant in the underground mine can release noxious fumes.
Source: Video Game / Wax Works -
Deadly Gas: In his monstrous form Beelzebub's breath is comparable to really, really noxious gases.
Source: Manga / Yondemasuyo, Azazel-san - Deadly Gas: Well, not really, but whenever they heat something plastic in their microwave oven, they experience noxious fumes.
Cite this Source
Noxious and Deadly. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/deadly/noxious
Deadly & Noxious. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/deadly/noxious>.
Noxious or Deadly. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/deadly/noxious.
Google Ngram Viewer shows how "deadly" and "noxious" have occurred on timeline