military vs combat ship

military and combat ship both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
combat ship	Yes	No	No	No

military (noun)	combat ship (noun)
the military forces of a nation	a government ship that is available for waging war

military (adjective)	combat ship (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