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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

Nearly 2,300 people died in the deadliest outbreak in the DRC between 2018 and 2020.

From Barron's • May 16, 2026

Eighteen people have died so far this year in immigrant detention facilities, leaving 2026 on track to be the agency’s deadliest year in more than two decades.

From Los Angeles Times • May 12, 2026

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

From BBC • May 12, 2026

I flinch back, not sure why he used every last sample of the deadliest plant in galaxy history to test an herbicide.

From "The Last Cuentista" by Donna Barba Higuera