I don't understand this game at all. And I don't imagine I'm the only baffled by your explaination. Can you make a rule sheet and claify the game.
I assume a catagory is a random list, such that it holds a set of X words. The scoring is then word frequency with the trick being linear growth per word?
Writing this down helped me; however, I'm still confused, what does the term "answer" refer to the answer to the game, or the resultant set of your guess?