bureau vs highboy

bureau and highboy both are nouns.

Word	Noun	Adjective	Verb	Adverb
bureau	Yes	No	No	No
highboy	Yes	No	No	No

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

bureau: furniture with drawers for keeping clothes
highboy: a tall chest of drawers divided into two sections and supported on four legs

Other hyponyms of bureau include chiffonier, commode, tallboy, lowboy.

bureau (noun)	highboy (noun)
furniture with drawers for keeping clothes	a tall chest of drawers divided into two sections and supported on four legs
an administrative unit of government