The word alcohol is also a polyseme, as in chemistry alcohols are compounds with an alcohol group, though only one of these, ethanol, is commonly consumed. Fake alcohol can be a problem in some countries, and this may contain poisonous methanol.
This can be a source of humour, though as with anything what is humorous v what is sad depends on perspective and context.
Alcohol addiction - Alcoholism is a serious health problem that can affect anyone, including teachers. If you think you have a drink problem, seek medical help.
Teflpedia has some alcohol conversation questions.