living-room suite vs livingroom suite

living-room suite and livingroom suite both are nouns.

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

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

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

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

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