Army vs military

Army and military both are nouns.

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

Army (noun)	military (noun)
the army of the United States of America; the agency that organizes and trains soldiers for land warfare	the military forces of a nation

Army (adjective)	military (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