Whiskey (with an "e") is kind of the umbrella term like 'wine' or 'beer'. "Bourbon whiskey" is produced in the United States and has to contain at least 51 percent corn. There are a number of legal requirements for something to be labeled a "whisky scotch", including being produced in Scotland. It must also be made from primarily malted barley and aged in oak barrels for a minimum of three years.