Synonyms of 'captor'
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The custodian of an official building, a companies' assets, or something else valuable is the person who is officially in charge of it.
the custodian of the holy shrine in Mecca
A guard is someone such as a soldier, police officer, or prison officer who is guarding a particular place or person.
The prisoners overpowered their guards and locked them in a cell.
Thesaurus for captor from the Collins English Thesaurus
You can refer to the person who has captured a person or animal as their captor .