military vs army engineer

military and army engineer both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
army engineer	Yes	No	No	No

military (noun)	army engineer (noun)
the military forces of a nation	a member of the military who is trained in engineering and construction work

military (adjective)	army engineer (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