high command vs SHAPE

high command and SHAPE both are nouns.

Word	Noun	Adjective	Verb	Adverb
high command	Yes	No	No	No
SHAPE	Yes	No	No	No

As nouns, SHAPE is a hyponym of high command; that is, SHAPE is a word with a more specific, narrower meaning than high command:

high command: the highest leaders in an organization (e.g. the commander-in-chief and senior officers of the military)
SHAPE: the supreme headquarters that advises NATO on military matters and oversees all aspects of the Allied Command Europe

Other hyponyms of high command include Supreme Headquarters Allied Powers Europe.

high command (noun)	SHAPE (noun)
the highest leaders in an organization (e.g. the commander-in-chief and senior officers of the military)	the supreme headquarters that advises NATO on military matters and oversees all aspects of the Allied Command Europe