Deadly synonyms

dĕd'lē

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Part of speech:

(Computing) Causing a sudden end to the running of a program.
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The definition of lethal is something very harmful or destructive, especially something that could cause death.
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Causing or likely to cause death
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(Informal) Capable of devastating or overwhelming:
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Acting as a poison; poisonous
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Malignant; spiteful; malicious
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Having a tendency to homicide; murderous
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The definition of noxious is something very unpleasant or something poisonous.
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Containing sufficient poison to be dangerous
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Covered in blood.
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Appearing as though dead, or on the verge of death.
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Dreadful; appalling
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Susceptible to death by aging, sickness, injury, or wound; not immortal. [from 14th c.]
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Harmful often in a subtle or unexpected way (as for example deleterious effects, deleterious to health).
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Miserable, wretched, distressed, suffering.
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(Chiefly medicine, of a disease or disease-causing agent) Highly infectious, malignant, or deadly.
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Causing or tending to cause cancer.
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Full of danger; likely to cause injury, pain, etc.; unsafe; perilous
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(Obsolete) Deadly, lethal.
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The definition of pernicious is deadly or very destructive.
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(Illness): Fatal; resulting in death.
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(Rare) healthy
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Producing or promoting a favorable result; advantageous:
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Arousing little interest; lacking liveliness; boring:
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The definition of dire is something so bad or scary that it causes distress or terror.
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The definition of tiresome is something tedious, boring or exceedingly dull.
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Causing death
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Causing harm to one's reputation; slanderous, libelous, invidious.
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Morally evil or deadly; pernicious.
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Causing death
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(Informal) Extremely reckless.
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Characterized by massive bloodshed.
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Tending toward cannibalism.
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Used to describe something that endangers the continued life of the subject.
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That literally deprives of life; lethal, deadly, fatal.
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Deadly or sinister.
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Causing or able to cause harm; hurtful
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Very forceful:
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Boring, monotonous, time consuming, wearisome.
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Participating or tending to participate in a very dangerous or difficult sport:
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Of, like, or characteristic of a ghost; spectral
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Not able to be placated or appeased.
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Mutually destructive; most often applied to warfare.
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(Archaic) Annoying; troublesome
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Bringing or tending to bring ruin; very destructive or harmful; disastrous
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Having or showing no pity; merciless; relentless
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Without mercy or compassion
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Not giving rise to legal liability:
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Sizable; considerable:
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Characterized by health and vigor of mind and body; specif., morally sound
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causing end of life
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Giving strength, energy and vitality.
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Full of energy or alertness; vigorous or animated:
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Containing life; living.
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Emaciated; gaunt:
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Resembling death.
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Extremely bad.
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Seemingly invisible; as a ghost, similar to a ghost.
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Having the appearance of a spectre; ghostly.
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Of a performance or speech, in person.
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Extremely destructive or harmful
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(used as intensives) extremely
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(used as intensives) extremely
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(used as intensives) extremely
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as if dead
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The definition of boring is something for making holes.
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causing end of life
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(used as intensives) extremely
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Synonym Study

  • Lethal is applied to that which in its nature or purpose is a cause of death a lethal weapon, a lethal dose
  • Mortal implies that death has occurred or is about to occur and is applied to the immediate cause of death he has received a mortal blow
  • Fatal implies the inevitability or actual occurrence of death or disaster a fatal disease, a fatal mistake
  • Deadly is applied to a thing that can and probably (but not inevitably) will cause death a deadly poison
Find another word for deadly. In this page you can discover 81 synonyms, antonyms, idiomatic expressions, and related words for deadly, like: fatal, lethal, malignant, murderous, toxic, venomous, homicidal, noxious, destructive, poisonous and bloody.