A ruler with absolute power; a tyrant.
A title awarded to senior members of the imperial family in the late Byzantine Empire, and claimed by various independent or semi-autonomous rulers in the Balkans (12th to 15th centuries)
One who enforces.
The member of a group, especially of a gang, charged with keeping dissident members obedient.
A hired strongman, especially working for the underworld.
A player who physically intimidates or confronts the opposition.