How to Prune Options Early in a Word Search

If you could do a million of those per second, which is more I think that a computer can do, it would take you 241,885 years. So we're going to work out what the ingredients are on the menu. But instead of... Instead of doing a next word, I would then compare it to all the pairs. Take short and milky and compare it to every other pair of words that don't have any letters in common. To see if between them that the pair of pairs has now 20 letters that are unique. How is that a better way of doing it than what I said? Way fewer options. Could you ever miss something?