butcherer means one who butchers; a brutal or indiscriminate killer.
Etymology
From butcher + -er. Attested since the 1640s.
noun
- One who butchers; a brutal or indiscriminate killer.“That G should be the first letter of his name that should succeed Edward; and the Duke of Clarence his name being George, 'twas thought he should be the Butcherer of Edwards sons, which Gloucester afterwards proved to be.”