western vs West

western and West both are nouns.

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

western (noun)	West (noun)
a sandwich made from a western omelet	the countries of (originally) Europe and (now including) North America and South America
	the region of the United States lying to the west of the Mississippi River
	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)

western (adjective)	West (adjective)
relating to or characteristic of the western parts of the world or the West as opposed to the eastern or oriental parts
of or characteristic of regions of the United States west of the Mississippi River
lying toward or situated in the west
of wind; from the west