high command vs armed services

high command and armed services both are nouns.

Word	Noun	Adjective	Verb	Adverb
high command	Yes	No	No	No
armed services	Yes	No	No	No

high command (noun)	armed services (noun)
the highest leaders in an organization (e.g. the commander-in-chief and senior officers of the military)	the military forces of a nation