United States Army vs military

United States Army and military both are nouns.

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

United States 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

United States 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