military vs ground forces

military and ground forces both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
ground forces	Yes	No	No	No

military (noun)	ground forces (noun)
the military forces of a nation	a permanent organization of the military land forces of a nation or state

military (adjective)	ground forces (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