Iberia vs geographical region

Iberia and geographical region both are nouns.

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

Iberia (noun)	geographical region (noun)
a peninsula in southwestern Europe	a demarcated area of the Earth
an ancient geographical region to the south of the Caucasus Mountains that corresponded approximately to the present-day Georgia