Causing danger; ready to do harm or injury.
Causing death or likely to cause death
Causing or capable of causing harm; injurious.
Capable of transmitting a disease; contagious:
The definition of lethal is something very harmful or destructive, especially something that could cause death.
Harmful to living things; injurious to health:
Causing great injury, destruction, or ruin; fatal; deadly
Morally evil or deadly; pernicious.
Virulent or threatening to life:
Pernicious; dangerous; harmful
(Med.) Violent and rapid in its course; highly malignant
Extremely destructive or harmful
Find another word for pestilent. In this page you can discover 15 synonyms, antonyms, idiomatic expressions, and related words for pestilent, like: dangerous, deadly, harmful, infectious, lethal, noxious, pernicious, pestiferous, baneful, malignant and pestilential.