MCIA vs bureau

MCIA and bureau both are nouns.

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

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

MCIA: an agency of the United States Marine Corps that provides responsive and broad intelligence support for the worldwide Marine Corps organization
bureau: an administrative unit of government

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

MCIA (noun)	bureau (noun)
an agency of the United States Marine Corps that provides responsive and broad intelligence support for the worldwide Marine Corps organization	furniture with drawers for keeping clothes
	an administrative unit of government