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 Takaichi has pledged to revise security and defense policies by December to bolster Japan’s military capabilities, lifting a ban on lethal weapons exports and moving further away from postwar pacifist principles. ABC News, 17 Feb. 2026 Quentin Kujala, the chief of conservation policy at Montana’s Department of Fish, Wildlife, and Parks, told me that the number of lethal wolf removals that officials have had to conduct due to livestock conflicts has decreased in that same time frame. Katherine J. Wu, The Atlantic, 16 Feb. 2026 Officers on a rooftop were recorded launching less lethal munitions at the media and peaceful demonstrators. Natasha Korecki, NBC news, 14 Feb. 2026 Russian opposition figure and outspoken Kremlin critic Alexey Navalny, who died two years ago, was killed while in prison by a lethal toxin found in poison dart frogs in South America, five European countries have said in a statement Saturday. Catherine Nicholls, CNN Money, 14 Feb. 2026 See All Example Sentences for lethal
Recent Examples of Synonyms for lethal
Adjective
  • His party successfully capitalized on rising nationalism fueled by a deadly border conflict between Thailand and Cambodia last year, economic woes and uncertainty over Thailand’s trade relationship with the United States, and built up a strong local support base.
    Helen Regan, CNN Money, 17 Feb. 2026
  • Prosecutors say Gray gave his son the weapon used in the deadly shooting for Christmas in 2023, months after his son had been accused of threatening a school shooting online.
    Christopher Cann, USA Today, 16 Feb. 2026
Adjective
  • That comment came during after-school fodder just days following the fatal shooting of Renee Good.
    Alisha Ebrahimji, CNN Money, 17 Feb. 2026
  • Two days after a fatal shooting inside a Kansas City nightclub, prosecutors have charged a Kansas City, Kansas, man with two counts of second-degree murder.
    Laura Bauer, Kansas City Star, 17 Feb. 2026
Adjective
  • All parts of delphinium plants are poisonous to humans and pets.
    Kim Toscano, Southern Living, 17 Feb. 2026
  • This was always a question of what happens to this friend group when there’s a poisonous dynamic at the center?
    Emily Longeretta, Variety, 17 Feb. 2026

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Cite this Entry

“Lethal.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lethal. Accessed 23 Feb. 2026.

More from Merriam-Webster on lethal

Last Updated: - Updated example sentences
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