Massachusetts vs U.S.A.

Massachusetts and U.S.A. both are nouns.

Word	Noun	Adjective	Verb	Adverb
Massachusetts	Yes	No	No	No
U.S.A.	Yes	No	No	No

Massachusetts (noun)	U.S.A. (noun)
the Algonquian language of the Massachuset	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 state in New England, with capital Boston; one of the original 13 colonies
one of the British colonies that formed the United States, with capital Salem, Charlestown or Boston
a member of the Algonquian people who formerly lived around Massachusetts Bay