North American nation vs North American country

North American nation and North American country both are nouns.

Word	Noun	Adjective	Verb	Adverb
North American nation	Yes	No	No	No
North American country	Yes	No	No	No

As nouns, North American nation and North American country are synonyms defined as:

North American nation and North American country: any country on the North American continent

North American nation (noun)	North American country (noun)
any country on the North American continent	any country on the North American continent