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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.

The effect was especially noticeable in pancreatic cancer, one of the deadliest forms of the disease.

From Science Daily • May 17, 2026

The 7 October 2023 was the deadliest ever day in Israel.

From BBC • May 12, 2026

The charges were released after a sweeping inquiry opened public hearings into Australia's deadliest mass shooting for 30 years.

From Barron's • May 6, 2026

Victor Lemus, Joshua Kelley-Eklund and William Osborn and marking the department’s deadliest incident in more than 150 years.

From Los Angeles Times • May 5, 2026

She was caught in one of the deadliest disasters in the history of Boston.

From "I Survived the Great Molasses Flood, 1919" by Lauren Tarshis