great power vs body politic

great power and body politic both are nouns.

Word	Noun	Adjective	Verb	Adverb
great power	Yes	No	No	No
body politic	Yes	No	No	No

As nouns, body politic is a hypernym of great power; that is, body politic is a word with a broader meaning than great power:

great power: a state powerful enough to influence events throughout the world
body politic: a politically organized body of people under a single government

Other hypernyms of great power include commonwealth, country, land, nation, res publica, state.

great power (noun)	body politic (noun)
a state powerful enough to influence events throughout the world	a politically organized body of people under a single government