old master vs Giotto di Bondone

old master and Giotto di Bondone both are nouns.

Word	Noun	Adjective	Verb	Adverb
old master	Yes	No	No	No
Giotto di Bondone	Yes	No	No	No

old master (noun)	Giotto di Bondone (noun)
a great European painter prior to 19th century	Florentine painter who gave up the stiff Byzantine style and developed a more naturalistic style; considered the greatest Italian painter prior to the Renaissance (1267-1337)