USCB vs Bureau of Customs

USCB and Bureau of Customs both are nouns.

Word	Noun	Adjective	Verb	Adverb
USCB	Yes	No	No	No
Bureau of Customs	Yes	No	No	No

As nouns, USCB and Bureau of Customs are synonyms defined as:

USCB and Bureau of Customs: the agency of the Treasury Department that enforces import tariffs

Other synonyms of USCB include Customs Bureau, Customs Service.

USCB (noun)	Bureau of Customs (noun)
the agency of the Treasury Department that enforces import tariffs	the agency of the Treasury Department that enforces import tariffs