military vs Pentagon

military and Pentagon both are nouns.

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

military (noun)	Pentagon (noun)
the military forces of a nation	a government building with five sides that serves as the headquarters of the United States Department of Defense
	the United States military establishment

military (adjective)	Pentagon (adjective)
associated with or performed by members of the armed services as contrasted with civilians
characteristic of or associated with soldiers or the military
of or relating to the study of the principles of warfare