piece of furniture vs furniture

piece of furniture and furniture both are nouns.

Word	Noun	Adjective	Verb	Adverb
piece of furniture	Yes	No	No	No
furniture	Yes	No	No	No

As nouns, piece of furniture and furniture are synonyms defined as:

piece of furniture and furniture: furnishings that make a room or other area ready for occupancy

Other synonyms of piece of furniture include article of furniture.

piece of furniture (noun)	furniture (noun)
furnishings that make a room or other area ready for occupancy	furnishings that make a room or other area ready for occupancy