armed services vs high command

armed services and high command both are nouns.

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

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