name part vs role

name part and role both are nouns.

Word	Noun	Adjective	Verb	Adverb
name part	Yes	No	No	No
role	Yes	No	No	No

As nouns, role is a hypernym of name part; that is, role is a word with a broader meaning than name part:

Other hypernyms of name part include character, part, persona, theatrical role.

name part (noun)	role (noun)
the role of the character after whom the play is named	the actions and activities assigned to or required or expected of a person or group
	normal or customary activity of a person in a particular social setting
	what something is used for
	an actor's portrayal of someone in a play