U.S. vs New Mexico

U.S. and New Mexico both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.S.	Yes	No	No	No
New Mexico	Yes	No	No	No

U.S. (noun)	New Mexico (noun)
the executive and legislative and judicial branches of the federal government of the United States	a state in southwestern United States on the Mexican border
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