military vs FO

military and FO both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
FO	Yes	No	No	No

military (noun)	FO (noun)
the military forces of a nation	an officer holding the rank of major or lieutenant colonel or colonel

military (adjective)	FO (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