Synonym Chooser

How does the adjective lethal differ from other similar words?

Some common synonyms of lethal are deadly, fatal, and mortal. While all these words mean "causing or capable of causing death," lethal applies to something that is bound to cause death or exists for the destruction of life.

lethal gas

When is deadly a more appropriate choice than lethal?

The words deadly and lethal can be used in similar contexts, but deadly applies to an established or very likely cause of death.

a deadly disease

When could fatal be used to replace lethal?

Although the words fatal and lethal have much in common, fatal stresses the inevitability of what has in fact resulted in death or destruction.

fatal consequences

When might mortal be a better fit than lethal?

While in some cases nearly identical to lethal, mortal implies that death has occurred or is inevitable.

a mortal wound

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of lethal Neither are the most lethal shooting teams from deep, with Houston 13th and Memphis 15th in made 3s per game. Kelly Iko, New York Times, 11 Apr. 2025 The executioner who initiates the flow of lethal chemicals into Tanzi's body then enters the room to begin the state's three-drug protocol — beginning with etomidate, an anesthetic, followed by rocuronium bromide, a paralytic, and potassium acetate, which will induce cardiac arrest. Raja Krishnamoorthi, MSNBC Newsweek, 9 Apr. 2025 And the notion that the administration’s allies in Silicon Valley can quickly produce large numbers of nimble, affordable, and lethal next generation weapons that will give America a decisive edge should be treated with a large grain of salt. William Hartung, Forbes.com, 8 Apr. 2025 Michael Tanzi, now 48, is scheduled to die by lethal injection at 6 p.m. at a state prison in Raiford. Joseph Wilkinson, New York Daily News, 8 Apr. 2025 See All Example Sentences for lethal
Recent Examples of Synonyms for lethal
Adjective
  • As tensions between India and Pakistan reach a boiling point following a deadly attack on tourists in Kashmir, Iranian Foreign Minister Abbas Araghchi has publicly offered Tehran's assistance in mediating the crisis.
    Thomas G. Moukawsher, MSNBC Newsweek, 25 Apr. 2025
  • However, fewer than five minutes into Casten’s address, a protester with a megaphone stood up and shouted frustrations about U.S. military assistance to Israel in its deadly attacks on Gaza residents during their war with Hamas.
    Olivia Stevens, Chicago Tribune, 25 Apr. 2025
Adjective
  • Across all suicide attempts not involving a firearm, only 4% result in death; but for firearm suicide, approximately 90% of attempts are fatal.
    Alyssa Goldberg, USA Today, 25 Apr. 2025
  • That stretch proved to be fatal for the Heat, as the Cavaliers extended their lead to nine with 16.9 seconds to play and put the game away before Miami scored again following this rough late-game span.
    Anthony Chiang, Miami Herald, 24 Apr. 2025
Adjective
  • Though gorgeous with color, azaleas are poisonous to animals and humans when ingested.
    Ashlyn Needham, Southern Living, 8 Apr. 2025
  • Every part of the pong pong tree is poisonous, but the leaves and barks aren’t as potent as the seeds.
    Angela Haupt, Time, 7 Apr. 2025

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Cite this Entry

“Lethal.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lethal. Accessed 29 Apr. 2025.

More from Merriam-Webster on lethal

Last Updated: - Updated example sentences
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