living-room set vs livingroom set

living-room set and livingroom set both are nouns.

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

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

living-room set and livingroom set: a suite of furniture for the living room

Other synonyms of living-room set include living-room suite, living room set, living room suite, livingroom suite.

living-room set (noun)	livingroom set (noun)
a suite of furniture for the living room	a suite of furniture for the living room