We all know that we cannot delete individual words in the dictionary ... however I found in thread in Android Applications that may be somewhat useful. I am posting it here becuase I dont know how many people check the other sections of the site. Here are a couple of the posts from that thread to explain. So basically you would need to keep a .txt file on your SD card with all the custom words you want in your dictionary. When ever you add some mistakes, you reset the dictionary and then run this app to add the words you want. Its not perfect, but its better than anything thus far.