United States of America vs St. Lawrence River

United States of America and St. Lawrence River both are nouns.

Word	Noun	Adjective	Verb	Adverb
United States of America	Yes	No	No	No
St. Lawrence River	Yes	No	No	No

United States of America (noun)	St. Lawrence River (noun)
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	a North American river; flows into the Gulf of Saint Lawrence and the North Atlantic