American state vs U.S.A.

American state and U.S.A. both are nouns.

Word	Noun	Adjective	Verb	Adverb
American state	Yes	No	No	No
U.S.A.	Yes	No	No	No

American state (noun)	U.S.A. (noun)
one of the 50 states of the 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