U.S.A. vs Great Lakes

U.S.A. and Great Lakes both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.S.A.	Yes	No	No	No
Great Lakes	Yes	No	No	No

U.S.A. (noun)	Great Lakes (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 group of five large, interconnected lakes in central North America