is applied to that which in its nature or purpose is a cause of death a lethal weapon, a lethal dose
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
implies the inevitability or actual occurrence of death or disaster a fatal disease, a fatal mistake
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, homicidal, venomous, deathly, noxious, poisonous and bloody.