United Mexican States vs Mexicano

United Mexican States and Mexicano both are nouns.

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

United Mexican States (noun)	Mexicano (noun)
a republic in southern North America; became independent from Spain in 1810	a Mexican (or person of Mexican descent) living in the United States