military machine vs high command

military machine and high command both are nouns.

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

military machine (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)