Hazelnut oil is a versatile and flavorful oil that is derived from roasted hazelnuts. The oil is commonly used in modern cuisine as a healthy alternative to traditional oils and adds a unique nutty flavor to any dish. But hazelnut oil is also known by other names, including filbert oil or cobnut oil, which refer to the species of hazelnut from which the oil is extracted. Other synonyms for hazelnut oil include Corylus avellana oil, European hazelnut oil, and simply, nut oil. Regardless of the name, hazelnut oil is a popular ingredient in many culinary recipes and is celebrated for its health benefits and delicious taste.