United Mexican States vs conquistador

United Mexican States and conquistador both are nouns.

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

United Mexican States (noun)	conquistador (noun)
a republic in southern North America; became independent from Spain in 1810	an adventurer (especially one who led the Spanish conquest of Mexico and Peru in the 16th century)