gr8white's word lists:

Note: While the words in these lists may bear a strong resemblance to the words that are acceptable in the world's most popular word game, no representation is made regarding an actual relationship to those words. While some of the lists are similar to lists found in other published sources, all have been created by me independently and were not adapted from those other sources. * Based on the definitions of Type I, Type II, and Type III as found in Scrabble Wordbook, Mike Baron, Sterling, 2007

Courtesy of Doug Kruyt: