bedsitting room vs bedsitter

bedsitting room and bedsitter both are nouns.

Word	Noun	Adjective	Verb	Adverb
bedsitting room	Yes	No	No	No
bedsitter	Yes	No	No	No

As nouns, bedsitting room and bedsitter are synonyms defined as:

bedsitting room and bedsitter: a furnished sitting room with sleeping accommodations (and some plumbing)

Other synonyms of bedsitting room include bedsit.

bedsitting room (noun)	bedsitter (noun)
a furnished sitting room with sleeping accommodations (and some plumbing)	a furnished sitting room with sleeping accommodations (and some plumbing)