war machine vs military

war machine and military both are nouns.

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

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

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

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

war 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