That which causes death, or destroys life.

a killer, a murderer.

A person who kills someone; (sometimes) spec. an executioner. Obsolete (archaic in later use).

A person who murders another; a person guilty of murder.

One who kills or slays; an executioner.

One who slays or kills. Also in figurative context.

One who or that which kills; a slayer, butcher.

One who or that which dispatches, in various senses: see the verb. spec. (a) North American = train dispatcher n. at train, n.2 compounds 2c; (b)…

transferred and figurative. One who puts another to death.

One who slaughters or kills.

(A name or nickname for) a person who or thing which kills, or is associated with killing or causing fatalities.

A killer or murderer.

(a) A person, technique, etc., that kills or does away with something. (b) spec. Any of various devices for destroying or warding off pests; also…