America whiskey is a type of distilled spirit that is produced in the United States. The term "America whiskey" is often used interchangeably with "bourbon," although bourbon technically must be made from at least 51% corn and aged in new charred oak barrels. Other synonyms for America whiskey include "rye whiskey," which is made from a mash bill of at least 51% rye grain, and "Tennessee whiskey," which is a type of bourbon that is made in Tennessee and undergoes a distinctive filtering process known as the "Lincoln County Process." Additionally, there are various regional styles of America whiskey, such as "Kentucky bourbon" and "Pennsylvania rye.