lamp vs article of furniture

lamp and article of furniture both are nouns.

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

As nouns, article of furniture is a hypernym of lamp; that is, article of furniture is a word with a broader meaning than lamp:

lamp: a piece of furniture holding one or more electric light bulbs
article of furniture: furnishings that make a room or other area ready for occupancy

Other hypernyms of lamp include furniture, piece of furniture.

lamp (noun)	article of furniture (noun)
an artificial source of visible illumination	furnishings that make a room or other area ready for occupancy
a piece of furniture holding one or more electric light bulbs