Synonyms of 'watchman'
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A caretaker is a person whose job it is to look after a large building such as a school or a block of flats or apartments, and deal with small repairs to it.
The caretaker sleeps in the building all night.
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
Thesaurus for watchman from the Collins English Thesaurus
A watchman is a person whose job is to guard a building or area.