A subjugator is a person or group that brings others under control, often by force.
The word subjugator can make people think of power, control, and sometimes oppression.
Examples:
The subjugator conquered the land.
The subjugator ruled with an iron fist.
The subjugator's army was very strong.
The subjugator made everyone wear silly hats.
The subjugator's power reached to the ends of the earth.
The subjugator's name was feared by all.