bureaucracy vs Pentagon

bureaucracy and Pentagon both are nouns.

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

As nouns, Pentagon is a hyponym of bureaucracy; that is, Pentagon is a word with a more specific, narrower meaning than bureaucracy:

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