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 that takes another as a captive.

n. One who is holding a captive or captives.

n. One who catches or has caught or captured something or someone.

n. One who captures any person or thing, as a prisoner or a prize.

n. One who captures or takes (a person or thing) by force, stratagem, or surprise; one who takes a prisoner or a prize.

n. a person who captures and holds people or animals

"She called her captor every name, and lived to take back all but one: Lover."

person    mortal    individual    someone    soul    somebody   

captivity    captive   

snatcher    abductor    kidnapper    surpriser   

capture   

adapter    adaptor    apter    chapter    raptor    subchapter   

pursuer    rescuer    assailant    persecutor    invader    tormentor    attacker    raider    soldiery    marauder