Deadly
Mutual synonyms
Both words in one sentence
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While they fail to destroy Earth when their Planetkiller is destroyed, their Plan B is to release a deadly and highly virulent plague on Earth to wipe out the majority of humanity.
Source: Synthetic Plague - Monkeys infected with a deadly and highly contagious virus, that makes them super aggressive and can spread by the slightest scratch or bite are held in steel frame cages?
Source: Idiot Plot / Live-Action Film - Caligula proceeded to learn the hard way that it's not a good idea to piss off the deadly, highly-trained men who happen to be the only thing keeping the people from burning you at the stake.
Source: Blood Knight / Real Life
Cite this Source
Highly and Deadly. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deadly/highly
Deadly & Highly. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deadly/highly>.
Highly or Deadly. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deadly/highly.
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