sitting room vs parlour

sitting room and parlour both are nouns.

Word	Noun	Adjective	Verb	Adverb
sitting room	Yes	No	No	No
parlour	Yes	No	No	No

As nouns, sitting room and parlour are synonyms defined as:

sitting room and parlour: a room in a private house or establishment where people can sit and talk and relax

Other synonyms of sitting room include front room, living-room, living room, parlor.

sitting room (noun)	parlour (noun)
a room in a private house or establishment where people can sit and talk and relax	reception room in an inn or club where visitors can be received
	a room in a private house or establishment where people can sit and talk and relax