military vs gun room

military and gun room both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
gun room	Yes	No	No	No

military (noun)	gun room (noun)
the military forces of a nation	military quarters of midshipmen and junior officers on a British warship

military (adjective)	gun room (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