USCB vs bureau

USCB and bureau both are nouns.

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

As nouns, bureau is a hypernym of USCB; that is, bureau is a word with a broader meaning than USCB:

Other hypernyms of USCB include agency, authority, federal agency, government agency, office.

USCB (noun)	bureau (noun)
the agency of the Treasury Department that enforces import tariffs	furniture with drawers for keeping clothes
	an administrative unit of government