military vs combatant

military and combatant both are nouns.

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

military (noun)	combatant (noun)
the military forces of a nation	someone who fights (or is fighting)

military (adjective)	combatant (adjective)
associated with or performed by members of the armed services as contrasted with civilians	engaging in or ready for combat
characteristic of or associated with soldiers or the military
of or relating to the study of the principles of warfare