geographical region vs Arcadia Aegypti

geographical region and Arcadia Aegypti both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographical region	Yes	No	No	No
Arcadia Aegypti	Yes	No	No	No

geographical region (noun)	Arcadia Aegypti (noun)
a demarcated area of the Earth	a department of Greece in the central Peloponnese