Liquor
A drinkable liquid containing ethanol that is produced by means of distilling fermented grain, fruit, or vegetables is called Liquor or a Spirit. Beer and wine are not distilled and therefore are not liquors. The distinction between spirits and liqueurs is widely unknown or ignored; consequently all alcoholic beverages other than beer and wine are generally referred to simply as spirits.
Spirits
The term spirit refers to a distilled beverage that contains no added sugar and has at least 20% ABV. Popular spirits include brandy, fruit brandy (aka eau-de-vie), gin, rum, tequila, vodka, and whisky.
Liqueurs
Distilled beverages that are bottled with added sugar and added flavorings, such as Grand Marnier, Frangelico, and American schnapps.
Serving
Neat / Straight — The spirit is served at room temperature without any additional ingredient. Straight up — The spirit is served chilled in a stemmed glass without any additional ingredient. On the rocks — The spirit is served over ice. With water - With a mixer - With a simple mixer such as club soda, tonic water, or cola. Cocktail - As an ingredient of a cocktail. With water poured over sugar, e.g., absinthe.