nation vs body politic

nation and body politic both are nouns.

Word	Noun	Adjective	Verb	Adverb
nation	Yes	No	No	No
body politic	Yes	No	No	No

As nouns, nation and body politic are synonyms defined as:

nation and body politic: a politically organized body of people under a single government

Other synonyms of nation include commonwealth, country, land, res publica, state.

nation (noun)	body politic (noun)
a politically organized body of people under a single government	a politically organized body of people under a single government
the people who live in a nation or country
a federation of tribes (especially Native American tribes)