Midwest vs MI

Midwest and MI both are nouns.

Word	Noun	Adjective	Verb	Adverb
Midwest	Yes	No	No	No
MI	Yes	No	No	No

Midwest (noun)	MI (noun)
the north central region of the United States (sometimes called the heartland or the breadbasket of America)	the government agency in the United Kingdom that is responsible for internal security and counterintelligence on British territory
	the government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas
	a midwestern state in north central United States in the Great Lakes region, with capital Lansing
	destruction of heart tissue resulting from obstruction of the blood supply to the heart muscle