Michigan vs midwestern United States

Michigan and midwestern United States both are nouns.

Word	Noun	Adjective	Verb	Adverb
Michigan	Yes	No	No	No
midwestern United States	Yes	No	No	No

Michigan (noun)	midwestern United States (noun)
a gambling card game in which chips are placed on the ace and king and queen and jack of separate suits (taken from a separate deck); a player plays the lowest card of a suit in his hand and successively higher cards are played until the sequence stops; the player who plays a card matching one in the layout wins all the chips on that card	the north central region of the United States (sometimes called the heartland or the breadbasket of America)
a midwestern state in north central United States in the Great Lakes region, with capital Lansing
the 3rd largest of the Great Lakes; the largest freshwater lake entirely within the United States borders