In my code, you can see I generate the my_dict.db from a plain text word file (in my case, 'all_words.txt'). Any dictionary file will do. I believe I used one of the word lists from here initially.
I actually got the official word file from the developer Gareth Taft but I do not have his permission to post it publicly. Actually, I realize now that I never updated this node with my revised code after he explained the missing components of my reverse engineering of the rules. See below: