station keeper vs deskman

station keeper and deskman both are nouns.

Word	Noun	Adjective	Verb	Adverb
station keeper	Yes	No	No	No
deskman	Yes	No	No	No

As nouns, station keeper and deskman are synonyms defined as:

station keeper and deskman: the police sergeant on duty in a police station

Other synonyms of station keeper include desk sergeant.

station keeper (noun)	deskman (noun)
the police sergeant on duty in a police station	the police sergeant on duty in a police station