European nation vs country

European nation and country both are nouns.

Word	Noun	Adjective	Verb	Adverb
European nation	Yes	No	No	No
country	Yes	No	No	No

As nouns, country is a hypernym of European nation; that is, country is a word with a broader meaning than European nation:

Other hypernyms of European nation include land, state.

European nation (noun)	country (noun)
any one of the countries occupying the European continent	a politically organized body of people under a single government
	the people who live in a nation or country
	the territory occupied by a nation
	an area outside of cities and towns
	a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)