West vs USA

West and USA both are nouns.

Word	Noun	Adjective	Verb	Adverb
West	Yes	No	No	No
USA	Yes	No	No	No

West (noun)	USA (noun)
the countries of (originally) Europe and (now including) North America and South America	the army of the United States of America; the agency that organizes and trains soldiers for land warfare
the region of the United States lying to the west of the Mississippi River	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
English painter (born in America) who became the second president of the Royal Academy (1738-1820)
United States film actress (1892-1980)
British writer (born in Ireland) (1892-1983)