Arizona is a noun. Thus, it satisfies conditions for being a minimal noun phrase. An extended noun phrase could include articles and/or adjectives, adverbs modifying the adjectives, or even complete clauses that assume the role of an adjective (or adverb).
The bolded words "the capital city of Arizona" form a noun phrase. A noun phrase consists of a noun and its modifiers, providing more information about the noun. In this case, "the capital city" serves as the main noun, while "of Arizona" specifies which capital city is being discussed.
In Arizona
its a proper noun
What kind of phrase is "If you save your money
The University of Arizona has named their sports teams 'The Wildcats'. Maybe that's the connection.
adjective phrase
copper
Verb phrase
adverb phrase
adjective phrase
prepositional phrase.
the name Arizona was from a Spanish name , Arizo nac , from the O'odham name ali sonak in O'odham language. Some possible organs that's been proposed are the Spanish phrase 'aida zona ,shortened to "Arizona" or the basque phrase atit ona.