China vs Chinese Wall

China and Chinese Wall both are nouns.

Word	Noun	Adjective	Verb	Adverb
China	Yes	No	No	No
Chinese Wall	Yes	No	No	No

China (noun)	Chinese Wall (noun)
a communist nation that covers a vast territory in eastern Asia; the most populous country in the world	a fortification 1,500 miles long built across northern China in the 3rd century BC; it averages 6 meters in width
a government on the island of Taiwan established in 1949 by Chiang Kai-shek after the conquest of mainland China by the Communists led by Mao Zedong