Asian nation vs Xizang

Asian nation and Xizang both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asian nation	Yes	No	No	No
Xizang	Yes	No	No	No

Asian nation (noun)	Xizang (noun)
any one of the nations occupying the Asian continent	an autonomous region of the Peoples Republic of China; located in the Himalayas