Yukon River vs USA

Yukon River and USA both are nouns.

Word	Noun	Adjective	Verb	Adverb
Yukon River	Yes	No	No	No
USA	Yes	No	No	No

Yukon River (noun)	USA (noun)
a North American river that flows westward from the Yukon Territory through central Alaska to the Bering Sea	the army of the United States of America; the agency that organizes and trains soldiers for land warfare
	North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776