Robert Benchley was a prolific American humorist, writer, and actor. A synonym for Benchley might be "wit", as he was known for his clever and humorous commentary on society and politics. Another synonym could be "satirist", as Benchley often used his writing to mock the absurdities of everyday life. "Entertainer" would also be a fitting synonym, as Benchley not only wrote humorous essays and articles, but also appeared in films and on radio programs, showcasing his talent for comedy. Other synonyms might include "humor columnist", "comedian", or simply "funny man". In any case, Robert Benchley's legacy of humor and entertainment lives on today.