AZ vs U.S.A.

AZ and U.S.A. both are nouns.

Word	Noun	Adjective	Verb	Adverb
AZ	Yes	No	No	No
U.S.A.	Yes	No	No	No

AZ (noun)	U.S.A. (noun)
a state in southwestern United States; site of the Grand Canyon	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
the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian