hotelkeeper vs hosteller

hotelkeeper and hosteller both are nouns.

Word	Noun	Adjective	Verb	Adverb
hotelkeeper	Yes	No	No	No
hosteller	Yes	No	No	No

As nouns, hotelkeeper and hosteller are synonyms defined as:

Other synonyms of hotelkeeper include hotel manager, hotelier, hotelman.

hotelkeeper (noun)	hosteller (noun)
an owner or manager of hotels	a traveler who lodges in hostels
	an owner or manager of hotels