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adverb

Synonym Chooser

How does the adjective deadly differ from other similar words?

Some common synonyms of deadly are fatal, lethal, and mortal. While all these words mean "causing or capable of causing death," deadly applies to an established or very likely cause of death.

a deadly disease

When would fatal be a good substitute for deadly?

In some situations, the words fatal and deadly are roughly equivalent. However, fatal stresses the inevitability of what has in fact resulted in death or destruction.

fatal consequences

When is lethal a more appropriate choice than deadly?

While in some cases nearly identical to deadly, lethal applies to something that is bound to cause death or exists for the destruction of life.

lethal gas

When could mortal be used to replace deadly?

The synonyms mortal and deadly are sometimes interchangeable, but 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 deadly
Adjective
From the second day of this year to April 1, there have been eight deadly domestic violence incidents in Kansas City, according to police. Laura Bauer, Kansas City Star, 8 Apr. 2025 Video contradicts Israeli military's claims about deadly incident 03:36 3. Jade Walker, CNN Money, 8 Apr. 2025
Adverb
Dangerous thunderstorms can happen at any time of the year – some turned deadly last week in Tennessee. Mary Gilbert, CNN, 10 Feb. 2025 Austin 'deadly serious' about keeping condition secret The report made clear that Austin, who is known to value his personal privacy, insisted on keeping his illness a secret. Tom Vanden Brook, USA TODAY, 15 Jan. 2025 See All Example Sentences for deadly
Recent Examples of Synonyms for deadly
Adjective
  • But South Carolina lawmakers saw it as the quickest and most humane way to kill an inmate, especially with the uncertainty in obtaining lethal injection drugs.
    Arkansas Online, Arkansas Online, 12 Apr. 2025
  • Mikal Mahdi, 42, chose to be executed by a firing squad over lethal injection or the electric chair, according to the Associated Press.
    Lesley Cosme Torres, People.com, 11 Apr. 2025
Adjective
  • Characterized by sheer white tones with a glossy finish, the milky nail look supplies a more natural look.
    Taylor Anderson, Vogue, 15 Apr. 2025
  • In addition, the sheer number of new projects is overwhelming power system operators’ ability to evaluate them, leading to increasing wait times for new generation to come online.
    Erin Baker, The Conversation, 14 Apr. 2025
Adjective
  • But while companies may be expected to carry on indefinitely, business leaders are mortal.
    Gerry Spitzer, Forbes.com, 14 Apr. 2025
  • Now, in the second episode, yet another woman seemed to be in mortal peril, and we’d once again been brought there in a slow-drip journey of madness by degrees.
    Daniel D'Addario, Variety, 10 Apr. 2025
Adverb
  • Though experts have maintained that aviation remains extremely safe, fatal incidents have raised concerns about flying.
    Thao Nguyen, USA Today, 20 Apr. 2025
  • Revel is extremely talented, but the Bills need a corner who can step in and be good to go from the beginning of the season.
    Nicholas Creel, MSNBC Newsweek, 20 Apr. 2025
Adjective
  • Black lung, a debilitating and often fatal condition caused by inhalation of coal and silica dust during mining, affects roughly 1 in 5 miners who have worked in the Central Appalachian mines for twenty-five years or more, according to NIOSH.
    Dr. Mark Abdelmalek, ABC News, 10 Apr. 2025
  • The day of the fatal fall, Goodwin said Bass had checked on Tidus and his brother minutes prior, and then had stepped outside with the dog.
    Nathan Pilling, Kansas City Star, 9 Apr. 2025
Adjective
  • While Ukraine agreed to all U.S. proposals for an unconditional ceasefire and subsequently agreed to plans for a smaller-scale maritime ceasefire, the Russians laid out last week a series of new demands, including the lifting of some U.S. sanctions.
    Barak Ravid, Axios, 2 Apr. 2025
  • The themes of the game were unconditional love and revenge, which is in line with the series as well.
    Vivian Kwarm, New York Daily News, 25 Mar. 2025
Adjective
  • That being said, the dream of NXT Europe isn't dead.
    Nicholas Creel, MSNBC Newsweek, 19 Apr. 2025
  • An Oakland bicyclist is dead following a Friday night hit-and-run incident.
    Stephanie Lam, Mercury News, 19 Apr. 2025
Adverb
  • An incredibly realistic short almond nail set that may just have your friends fooled.
    Conçetta Ciarlo, Vogue, 14 Apr. 2025
  • McIlroy came out incredibly hot, turning a two-shot deficit to Justin Rose into a three-shot lead in just over an hour.
    David Faris, MSNBC Newsweek, 13 Apr. 2025

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Cite this Entry

“Deadly.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/deadly. Accessed 25 Apr. 2025.

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