Is it possible to add an alias to a command?

I have a point in the game where the player can 'buy beer' which runs quite a complicated script. I want the player to also be able to use 'buy drink' or 'buy a beer' or 'order a pint', but if I simply duplicate the 'buy beer' command and paste with different expression i.e. 'buy drink' it causes me logic problems.

Just concatenate them with semi-colons.

  buy beer;buy drink;buy a beer

If the drink is ab object, it is better to let Quest match the object, using its alt names (Object tab), then the command is just

  buy #object#;purchase #object#

You might want to look at this thread too:
http://textadventures.co.uk/forum/quest/topic/k1jdaxmpk0m8xj-zhmev8w/open-bar-question

genius! That saves me boatload of hassle