Unsweetened, distilled, alcoholic drinks that have an alcohol content of at least 20% ABV are called spirits. For the most common distilled drinks, such as whiskey and vodka, the alcohol content is around 40%.
Gin is a distilled liquor that gets its flavor from juniper berries.
Whiskey is a distilled liquor made from grain mash. There are many types of whiskey from different regions. Popular styles are Bourbon, Rye Whiskey, Scotch Whisky, Canadian Whisky, Japanese Whisky, Tennessee Whiskey and Irish Whiskey. There are also flavoured whiskies, like Peanut Butter Whiskey and Fireball Whisky.
Vodka is a clear distilled liquor from Europe with a neutral flavor.
Tequila is a Mexican distilled spirit made from a specific type of agave: the blue agave plant, or agave tequiliana. Mezcal is the category of spirit made from any variety of agave, so tequila is a type of mezcal. Styles of tequila include blanco, reposado, and añejo.