There are several synonyms that can be used in place of the name "John Henry O'Hara." Some of these include J.H. O'Hara, Jack O'Hara, and John O'Hara. John Henry O'Hara was an American author and playwright known for his gritty realism and his exploration of the lives of the working class. His writing often confronted taboo subjects, including adultery, racism, and homosexuality, and he was known for his unsentimental and cynical style. O'Hara was a prolific writer, and his works are still studied and admired today for their sharp insights, vivid characters, and unflinching portrayals of American life and society.