Cathay vs Port Arthur

Cathay and Port Arthur both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cathay	Yes	No	No	No
Port Arthur	Yes	No	No	No

Cathay (noun)	Port Arthur (noun)
a communist nation that covers a vast territory in eastern Asia; the most populous country in the world	a battle in the Chino-Japanese War (1894); Japanese captured the port and fortifications from the Chinese
	a major port city in northeastern China on the Liaodong Peninsula; now a part of Luda