Whisky or whiskey is a type of distilled alcoholic beverage made from fermented grain mash. Various grains (which may be malted) are used for different varieties, including barley, corn (maize), rye, and wheat. Whisky is typically aged in wooden casks, generally made of charred white oak. Much is made of the word’s two spellings: whisky and whiskey. American rye whiskey must be distilled from at least 51 percent rye. Rye grain is known for imparting what many call a spicy or fruity flavor to the whiskey. Bourbon, distilled from at least 51% corn, is noticeably sweeter, and tends to be fuller bodied than rye.