military vs military machine

military and military machine both are nouns.

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

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

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

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

military (adjective)	military machine (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