Executioner

Executioner - (Easton's Bible Dictionary)

(Mark 6:27). Instead of the Greek word, Mark here uses a Latin word, speculator, which literally means "a scout," "a spy," and at length came to denote one of the armed bodyguard of the emperor. Herod Antipas, in imitation of the emperor, had in attendance on him a company of speculatores. They were sometimes employed as executioners, but this was a mere accident of their office. (See MARK, GOSPEL [197]OF.)

Executioner - (Webster's 1828 Dictionary)

EXECU'TIONER, n. One who executes; one who carries into effect a judgment of death; one who inflicts a capital punishment in pursuance of a legal warrant. It is chiefly used in this sense.

1. He that kills; he that murders.

2. The instrument by which any thing is performed.