Balkan state vs Greece

Balkan state and Greece both are nouns.

Word	Noun	Adjective	Verb	Adverb
Balkan state	Yes	No	No	No
Greece	Yes	No	No	No

As nouns, Greece is a hyponym of Balkan state; that is, Greece is a word with a more specific, narrower meaning than Balkan state:

Balkan state: any one of the countries on the Balkan Peninsula
Greece: ancient Greece; a country of city-states (especially Athens and Sparta) that reached its peak in the fifth century BCE

Balkan state (noun)	Greece (noun)
any one of the countries on the Balkan Peninsula	a republic in southeastern Europe on the southern part of the Balkan peninsula; known for grapes and olives and olive oil
	ancient Greece; a country of city-states (especially Athens and Sparta) that reached its peak in the fifth century BCE