A list of all three letter Scrabble words deemed acceptable in U.S. Club and Tournament play. If you hope to win at the highest tiers of professional Scrabble, then you need to know these three letter words. Not only for yourself, mind you, but to be certain your opponent is using legal words as well. This list is current as of time of publication. As many Scrabble players know, the list of legal words evolves over time. So take the time to memorize these 3 letter words. In 2005 alone, the Official Scrabble Players Dictionary added 4000 new words to the list. With this list at your disposal, you'll be at the top of your game in no time.