So far I haven't had to pass far into a game (though I'm trying to figure out how to resign a brand new game with a former high school classmate/elementary school friend who has drawn twice and wrote words both times /rant) but if you insist on cheating you can go here: http://bestofdrawsomething.com/

On the right-hand side there's an option to put in the letters you have to choose from and how many letters the answer is. Then it'll give you a list of words from the game that it could be.