MI vs USA

MI and USA both are nouns.

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

MI (noun)	USA (noun)
the government agency in the United Kingdom that is responsible for internal security and counterintelligence on British territory	the army of the United States of America; the agency that organizes and trains soldiers for land warfare
the government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas	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
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