This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. One who, or that which, subdues.

n. One who, or that which, subdues; a conqueror.

n. One who or that which subdues; one who conquers and brings into subjection; a conqueror; a tamer.

n. someone who overcomes and establishes ascendancy and control by force or persuasion

"And burning dawn now awakened beside me, and I got up on my elbow and acknowledged my conqueror, my subduer, and the room for taming me in."

restrainer    controller   

conqueror   

represser    vanquisher    scorcher    graybeards    chastiser    ex-boss    scorning    smiter    sliding scale    stage whisper