South Carolina vs USA

South Carolina and USA both are nouns.

Word	Noun	Adjective	Verb	Adverb
South Carolina	Yes	No	No	No
USA	Yes	No	No	No

South Carolina (noun)	USA (noun)
a state in the Deep South; one of the original 13 colonies	the army of the United States of America; the agency that organizes and trains soldiers for land warfare
one of the British colonies that formed the United States, with capital Charles Towne	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