Guangzhou vs People's Republic of China

Guangzhou and People's Republic of China both are nouns.

Word	Noun	Adjective	Verb	Adverb
Guangzhou	Yes	No	No	No
People's Republic of China	Yes	No	No	No

Guangzhou (noun)	People's Republic of China (noun)
a city on the Zhu Jiang delta in southern China; the capital of Guangdong province and a major deep-water port	a communist nation that covers a vast territory in eastern Asia; the most populous country in the world