Great Wall of China vs Great Wall

Great Wall of China and Great Wall both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Wall of China	Yes	No	No	No
Great Wall	Yes	No	No	No

As nouns, Great Wall of China and Great Wall are synonyms defined as:

Great Wall of China and Great Wall: a fortification 1,500 miles long built across northern China in the 3rd century BC; it averages 6 meters in width

Other synonyms of Great Wall of China include Chinese Wall.

Great Wall of China (noun)	Great Wall (noun)
a fortification 1,500 miles long built across northern China in the 3rd century BC; it averages 6 meters in width	a fortification 1,500 miles long built across northern China in the 3rd century BC; it averages 6 meters in width