bedsitter vs bedsitting room

bedsitter and bedsitting room both are nouns.

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

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

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

Other synonyms of bedsitter include bedsit.

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