military vs military hospital

military and military hospital both are nouns.

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

military (noun)	military hospital (noun)
the military forces of a nation	hospital for soldiers and other military personnel

military (adjective)	military hospital (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