living-room vs living room

living-room and living room both are nouns.

Word	Noun	Adjective	Verb	Adverb
living-room	Yes	No	No	No
living room	Yes	No	No	No

As nouns, living-room and living room are synonyms defined as:

living-room and living room: a room in a private house or establishment where people can sit and talk and relax

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

living-room (noun)	living room (noun)
a room in a private house or establishment where people can sit and talk and relax	a room in a private house or establishment where people can sit and talk and relax