North Korea vs Yalu River

North Korea and Yalu River both are nouns.

Word	Noun	Adjective	Verb	Adverb
North Korea	Yes	No	No	No
Yalu River	Yes	No	No	No

North Korea (noun)	Yalu River (noun)
a communist country in the northern half of the Korean Peninsula; established in 1948	a battle in the Korean War (November 1950); when UN troops advanced north to the Yalu River 200,000 Chinese troops crossed the river and drove them back
	river in eastern Asia; rises in North Korea and flows southwest to Korea Bay (forming part of the border between North Korea and China)