Land of Lincoln vs U.S.A.

Land of Lincoln and U.S.A. both are nouns.

Word	Noun	Adjective	Verb	Adverb
Land of Lincoln	Yes	No	No	No
U.S.A.	Yes	No	No	No

Land of Lincoln (noun)	U.S.A. (noun)
a midwestern state in north-central United States	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