AFISR vs bureau

AFISR and bureau both are nouns.

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

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

AFISR: an agency focused on ensuring that the United States military attains information superiority; operates worldwide ground sites and an array of airborne reconnaissance and surveillance platforms
bureau: an administrative unit of government

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

AFISR (noun)	bureau (noun)
an agency focused on ensuring that the United States military attains information superiority; operates worldwide ground sites and an array of airborne reconnaissance and surveillance platforms	furniture with drawers for keeping clothes
	an administrative unit of government