Definition of lethalnext

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 His job is to identify the objects flying above it, to distinguish birds and bats from lethal Russian drones. Anne Applebaum, The Atlantic, 7 June 2026 Not only that, but swimming pools can be lethal to frogs and other small animals. Brandee Gruener, Southern Living, 7 June 2026 In his lethal line of work, Lobo comes fortified with an arsenal of guns, blades, grenades, and a wicked titanium chain equipped with a sharp hook. Jeff Spry, Space.com, 6 June 2026 That suited an Atalanta side that was formidable on the transition, and a United team that can be lethal on the counter-attack. Carl Anka, New York Times, 5 June 2026 See All Example Sentences for lethal
Recent Examples of Synonyms for lethal
Adjective
  • Japan has long been battling a growing bear problem with deadly attacks reached record levels last fall.
    Jessie Yeung, CNN Money, 9 June 2026
  • Prosecutors contend the evidence shows Anthony escalated a verbal dispute into a deadly encounter.
    Stepheny Price, FOXNews.com, 9 June 2026
Adjective
  • The fatal bear encounter at Glacier National Park occurred in the same week that two hikers were injured in a bear attack at Yellowstone National Park in Wyoming, according to the park service.
    Thao Nguyen, USA Today, 10 June 2026
  • The Sheriff’s Office did not release any details about a motive or what might have led to the fatal shooting.
    Rosalio Ahumada, Sacbee.com, 10 June 2026
Adjective
  • Foxglove Foxglove features beautiful trumpet-like blossoms that are poisonous to cats.
    Amy DeYoung, USA Today, 3 June 2026
  • Some have thorns or spines, others have poisonous leaves or berries, and still others have…elaborate chemical defense alarm systems?
    Regina G. Barber, NPR, 3 June 2026

Browse Nearby Words

Cite this Entry

“Lethal.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lethal. Accessed 11 Jun. 2026.

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