Epirus vs geographical region

Epirus and geographical region both are nouns.

Word	Noun	Adjective	Verb	Adverb
Epirus	Yes	No	No	No
geographical region	Yes	No	No	No

Epirus (noun)	geographical region (noun)
an ancient area on the Ionian Sea that flourished as a kingdom in the 3rd century BC; located in northwestern Greece and southern Albania	a demarcated area of the Earth