There is some confusion over the two names, but they are not the same thing. Arugula is a type of rocket, but the rocket is not a type of arugula. Arugula is a peppery-flavored leafy green vegetable. It is also called roquette and arugula. It is commonly found in salads. Rocket is a leafy green vegetable that has a slightly bitter flavor. It is also called arugula and rucola. It is commonly found in salads and as a pizza topping.