USA vs War between the States

USA and War between the States both are nouns.

Word	Noun	Adjective	Verb	Adverb
USA	Yes	No	No	No
War between the States	Yes	No	No	No

USA (noun)	War between the States (noun)
the army of the United States of America; the agency that organizes and trains soldiers for land warfare	civil war in the United States between the North and the South; 1861-1865
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