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
Virulent is a synonym for deadly in lethal topic. In some cases you can use "Virulent" instead an adjective "Deadly", when it comes to topics like help, noxious, poisonous, murderous. popular alternative
Nearby Word: dead
Virulent
Virulent adjective - Extremely poisonous or injurious; producing venom.
Usage example: a virulent insect bite
Deadly is a synonym for virulent in poisonous topic. You can use "Deadly" instead an adjective "Virulent", if it concerns topics such as help, noxious, lethal, murderous. popular alternative
Nearby Word: virulence
Mutual synonyms
Both words in one sentence
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And a footnote compares vampirism to diseases — some are extremely virulent and deadly, and some just make you avoid fruit and walk funny.
Source: Discworld / Carpe Jugulum - According to Carpe Jugulum (possibly riffing off Captain Kronos): There are as many types of vampire as there are disease; some are virulent and deadly, and some just make you walk funny and avoid fruit.
Source: As Many X as There Are Y -
Hailing from the deadly jungle world of Catachan, the toads blow up whenever they feel startled or threatened, spreading virulent toxins over their surroundings.
Source: Action Bomb
Cite this Source
Virulent and Deadly. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deadly/virulent
Deadly & Virulent. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deadly/virulent>.
Virulent or Deadly. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deadly/virulent.
Google Ngram Viewer shows how "deadly" and "virulent" have occurred on timeline