Synonyms for Role (same or very similar meaning)
WordNet sense 1 (an actor's portrayal of someone in a play):
character, part, persona, theatrical role
WordNet sense 2 (what something is used for):
function, purpose, use, use
WordNet sense 3 (the actions and activities assigned to or required or expected of a person or group):
office
From the ODE community, based on WordNet
add/edit