military vs shipboard soldier

military and shipboard soldier both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
shipboard soldier	Yes	No	No	No

military (noun)	shipboard soldier (noun)
the military forces of a nation	a member of the United States Marine Corps

military (adjective)	shipboard soldier (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