United Mexican States vs Mexican

United Mexican States and Mexican both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Mexican States	Yes	No	No	No
Mexican	Yes	Yes	No	No

United Mexican States (noun)	Mexican (noun)
a republic in southern North America; became independent from Spain in 1810	a native or inhabitant of Mexico

United Mexican States (adjective)	Mexican (adjective)
	of or relating to Mexico or its inhabitants