BJA vs bureau

BJA and bureau both are nouns.

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

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

BJA: the bureau in the Department of Justice that assists local criminal justice systems to reduce or prevent crime and violence and drug abuse
bureau: an administrative unit of government

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

BJA (noun)	bureau (noun)
the bureau in the Department of Justice that assists local criminal justice systems to reduce or prevent crime and violence and drug abuse	furniture with drawers for keeping clothes
	an administrative unit of government