Asia vs Tajikistan

Asia and Tajikistan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asia	Yes	No	No	No
Tajikistan	Yes	No	No	No

Asia (noun)	Tajikistan (noun)
the nations of the Asian continent collectively	a landlocked mountainous republic in southeast central Asia to the north of Afghanistan; formerly an Asian soviet
the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations