bedsitting room vs bedsit

bedsitting room and bedsit both are nouns.

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

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

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

Other synonyms of bedsitting room include bedsitter.

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