United Mexican States vs Chapultepec

United Mexican States and Chapultepec both are nouns.

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

United Mexican States (noun)	Chapultepec (noun)
a republic in southern North America; became independent from Spain in 1810	a pitched battle in the Mexican War that resulted in a major victory for American forces over Mexican forces at a locality south of Mexico City (1847)