Balkan country vs Balkan nation

Balkan country and Balkan nation both are nouns.

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

As nouns, Balkan country and Balkan nation are synonyms defined as:

Balkan country and Balkan nation: any one of the countries on the Balkan Peninsula

Other synonyms of Balkan country include Balkan state.

Balkan country (noun)	Balkan nation (noun)
any one of the countries on the Balkan Peninsula	any one of the countries on the Balkan Peninsula