old master vs Alessandro di Mariano dei Filipepi

old master and Alessandro di Mariano dei Filipepi both are nouns.

Word	Noun	Adjective	Verb	Adverb
old master	Yes	No	No	No
Alessandro di Mariano dei Filipepi	Yes	No	No	No

old master (noun)	Alessandro di Mariano dei Filipepi (noun)
a great European painter prior to 19th century	Italian painter of mythological and religious paintings (1444-1510)