AFISR vs government agency

AFISR and government agency both are nouns.

Word	Noun	Adjective	Verb	Adverb
AFISR	Yes	No	No	No
government agency	Yes	No	No	No

As nouns, government agency is a hypernym of AFISR; that is, government agency 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
government agency: an administrative unit of government

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

AFISR (noun)	government agency (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	an administrative unit of government