furniture vs article of furniture

furniture and article of furniture both are nouns.

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

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

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

Other synonyms of furniture include piece of furniture.

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