Lethal synonyms

lē'thəl

Suggestive of death:

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Susceptible to death by aging, sickness, injury, or wound; not immortal. [from 14th c.]

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(Computing) Causing a sudden end to the running of a program.

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(Medicine) Tending to metastasize:

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harmful (related)

Causing or capable of causing harm; injurious.

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poisonous (related)

Containing sufficient poison to be dangerous

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The definition of dangerous is something that is potentially harmful, damaging or likely to cause an accident or injury.

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Poisonous or poisoned

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Capable of causing injury or death, especially by chemical means; poisonous:

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harmless (antonym)

Not intended to harm or offend; inoffensive.

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safe (antonym)

Free from danger or injury; undamaged or unhurt:

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life-giving (antonym)

Describing that which causes or preserves life, often for that which is essential to survival.

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helpful (antonym)

Providing assistance; useful.

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beneficial (antonym)

Receiving benefit

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The definition of deathly is something that is related to or likely to cause death.

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Containing life; living.

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live (related)

Of a performance or speech, in person.

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Find another word for lethal. In this page you can discover 17 synonyms, antonyms, idiomatic expressions, and related words for lethal, like: deadly, mortal, fatal, malignant, harmful, poisonous, dangerous, poison, toxic, harmless and safe.