Nouns

(n)slaughterthe killing of animals (as for food)
(n)slaughter, massacre, mass murder, carnage, butcherythe savage and excessive killing of many people

Verbs

(v)butcher, slaughterkill (animals) usually for food consumption“They slaughtered their only goat to survive the winter”
(v)massacre, slaughter, mow downkill a large number of people indiscriminately“The Hutus massacred the Tutsis in Rwanda”