Cathay vs Asia

Cathay and Asia both are nouns.

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

Cathay (noun)	Asia (noun)
a communist nation that covers a vast territory in eastern Asia; the most populous country in the world	the nations of the Asian continent collectively
	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