military machine vs military

military machine and military both are nouns.

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

As nouns, military machine and military are synonyms defined as:

Other synonyms of military machine include armed forces, armed services, war machine.

military machine (noun)	military (noun)
the military forces of a nation	the military forces of a nation

military machine (adjective)	military (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