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deadliest

ADJECTIVE

causing end of life

Synonyms

STRONGEST

bloody carcinogenic cruel dangerous destructive fatal harmful lethal malignant mortal murderous noxious pernicious poisonous savage suicidal toxic violent virulent

WEAK

baleful baneful bloodthirsty cannibalistic death-dealing deathly deleterious destroying grim homicidal injurious internecine killing mortiferous pestiferous pestilent pestilential ruthless slaying unrelenting venomous

Antonyms

STRONGEST

benign calm gentle harmless healthy helpful kind life-giving nice nonpoisonous wholesome

WEAK

animating energizing healthful invigorating lively

ADJECTIVE

ghostly

Synonyms

STRONGEST

ghastly

WEAK

ashen corpselike dead deadened deathful deathlike deathly pallid wan white

Antonyms

WEAK

animating energizing harmless healthful healthy invigorating lively wholesome

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It was one of America’s deadliest mining accidents and inspired the Federal Mine Safety & Health Act of 1977.

From The Wall Street Journal • Jun. 4, 2026

Pratt entered the mayoral race a year after he lost his home in the devastating fires in the city in 2025, which were some of the deadliest and most destructive blazes in the area's history.

From BBC • Jun. 2, 2026

“Daraxonrasib significantly elevates the survival bar in the treatment of one of the deadliest human cancers, while better preserving quality of life compared with chemotherapy,” Mark A. Goldsmith, M.D.,

From MarketWatch • Jun. 1, 2026

The conflict has since spiralled into Europe's deadliest since World War II.

From Barron's • May 25, 2026

The Spanish flu of 1918 had raged through the continent, killing nearly 20 million men and women worldwide and ranking among the deadliest natural disasters in history.

From "The Gene" by Siddhartha Mukherjee