Mongolia vs geographical region

Mongolia and geographical region both are nouns.

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

Mongolia (noun)	geographical region (noun)
a landlocked socialist republic in central Asia	a demarcated area of the Earth
a vast region in Asia including the Mongolian People's Republic and China's Inner Mongolia