Mezcal, sometimes spelled mescal, is a distilled alcoholic beverage made from any type of agave. The word mezcal comes from Nahuatl mexcalli, which means "oven-cooked agave", from metl and ixcalli. Traditionally the word "mezcal" has been used generally in Mexico for all agave spirits and it continues to be used for many agave spirits whether these spirits have been legally certified as "mezcal" or not.

Liquor is an alcoholic drink produced by the distillation of grains, fruits, vegetables, or sugar that have already gone through alcoholic fermentation. Other terms for liquor include: spirit, distilled beverage, booze, spirituous liquor or hard liquor. The distillation process concentrates the liquid to increase its alcohol by volume. As liquors contain significantly more alcohol (ethanol) than other alcoholic drinks, they are considered "harder." In North America, the term hard liquor is sometimes used to distinguish distilled alcoholic drinks from non-distilled ones, whereas the term spirits is more commonly used in the UK. Some examples of liquors include vodka, rum, gin, and tequila. Liquors are often aged in barrels, such as for the production of brandy and whiskey, or are infused with flavorings to form flavored liquors, such as absinthe.