sideboard vs credenza

sideboard and credenza both are nouns.

Word	Noun	Adjective	Verb	Adverb
sideboard	Yes	No	No	No
credenza	Yes	No	No	No

As nouns, credenza is a hyponym of sideboard; that is, credenza is a word with a more specific, narrower meaning than sideboard:

sideboard: a piece of furniture that stands at the side of a dining room; has shelves and drawers
credenza: a kind of sideboard or buffet

Other hyponyms of sideboard include credence, cellaret, minibar.

sideboard (noun)	credenza (noun)
a piece of furniture that stands at the side of a dining room; has shelves and drawers	a kind of sideboard or buffet
a board that forms part of the side of a bed or crib
a removable board fitted on the side of a wagon to increase its capacity