Mount Orizaba vs Pico de Orizaba

Mount Orizaba and Pico de Orizaba both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mount Orizaba	Yes	No	No	No
Pico de Orizaba	Yes	No	No	No

As nouns, Mount Orizaba and Pico de Orizaba are synonyms defined as:

Mount Orizaba and Pico de Orizaba: an extinct volcano in southern Mexico between Mexico City and Veracruz; the highest peak in Mexico (18,695 feet)

Other synonyms of Mount Orizaba include Citlaltepetl, Mt Orizaba.

Mount Orizaba (noun)	Pico de Orizaba (noun)
an extinct volcano in southern Mexico between Mexico City and Veracruz; the highest peak in Mexico (18,695 feet)	an extinct volcano in southern Mexico between Mexico City and Veracruz; the highest peak in Mexico (18,695 feet)