war machine vs armed services

war machine and armed services both are nouns.

Word	Noun	Adjective	Verb	Adverb
war machine	Yes	No	No	No
armed services	Yes	No	No	No

As nouns, war machine and armed services are synonyms defined as:

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

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