Pentagon vs bureaucracy

Pentagon and bureaucracy both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pentagon	Yes	No	No	No
bureaucracy	Yes	No	No	No

As nouns, bureaucracy is a hypernym of Pentagon; that is, bureaucracy is a word with a broader meaning than Pentagon:

Other hypernyms of Pentagon include bureaucratism.

Pentagon (noun)	bureaucracy (noun)
a government building with five sides that serves as the headquarters of the United States Department of Defense	nonelective government officials
the United States military establishment	a government that is administered primarily by bureaus that are staffed with nonelective officials
	any organization in which action is obstructed by insistence on unnecessary procedures and red tape