Granville-Barker was a famous British actor, playwright, and director. Although there aren't many synonyms for his name directly, some words that could be associated with him might include theater, artistry, drama, stagecraft, and creativity. He was known for his contributions to the world of theater, both in terms of his own plays and his work as a director and actor. Therefore, any words associated with the world of theater might be appropriate when discussing Granville-Barker. Synonyms for his individual name might include his first name, Harley, or his surname, Barker.