Whale oil refers specifically to oil obtained from the blubber of whales. As it is no longer legal to hunt whales for their oil, many synonyms have been used to describe similar products. Synthetic blends of oils are often used as substitutes, such as mineral or vegetable oils. Some terms often used as synonyms for whale oil include fish oil, seal oil, and cod oil, as these oils are also obtained from marine animals. More generic terms such as lubricating oil or cutting oil may be used to describe similar products used for industrial or mechanical purposes. These alternative options ensure that the usage of whale oil will continue to decrease in modern times.