military vs fatigue duty

military and fatigue duty both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
fatigue duty	Yes	No	No	No

military (noun)	fatigue duty (noun)
the military forces of a nation	labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on)

military (adjective)	fatigue duty (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