This is an interesting topic.
I would be interested it that classification as well. Here are basic definitions for start.
Wiki says:
"A
distilled beverage,
spirit,
liquor,
hard liquor or
hard alcohol is an
alcoholic beverage produced by
distillation of a mixture produced from
alcoholic fermentation. This process purifies it and removes diluting components like water, for the purpose of increasing its
proportion of alcohol content (commonly expressed as alcohol by volume,
ABV).
[1] As distilled beverages contain more alcohol, they are considered "harder" – in North America, the term
hard liquor is used to distinguish distilled beverages from undistilled ones, which are implicitly weaker.
As examples, this
does not include beverages such as
beer,
wine, and
cider, as they are fermented but not distilled. These all have relatively low alcohol content, typically less than 15%.
Brandy is a spirit produced by the distillation of wine, and has an ABV over 35%. Other examples of distilled beverages include
vodka,
gin,
rum, and
whisky."
Don't confuse
liquor with
A
liqueur (
US /lɪˈkɜːr/ or
UK /lɪˈkjʊər/) is an
alcoholic beverage made from a
distilled spirit that has been flavored with
fruit,
cream,
herbs,
spices,
flowers or
nuts and bottled with added sugar or other sweetener (such as
high-fructose corn syrup). Liqueurs are typically quite sweet; they are usually not aged for long after the ingredients are mixed, but may have resting periods during their production to allow flavors to marry.
This can turn into a long discussion as there are so many types of alcohol! There could be long posts about various types of wine, beer and all the fruits and grain that can be distilled.
Here's basic wine guide http://winefolly.com/wp-content/uploads/2013/10/basic-wine-101-guide-infographic-poster.jpg#big
types of beer
http://brookstonbeerbulletin.com/types-of-beer/