Lusitania vs geographic region

Lusitania and geographic region both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lusitania	Yes	No	No	No
geographic region	Yes	No	No	No

Lusitania (noun)	geographic region (noun)
ancient region and Roman province on the Iberian Peninsula; corresponds roughly to modern Portugal and parts of Spain	a demarcated area of the Earth