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I enlisted a couple of sherpas to guide me through the world of word combinations. One was OneLook, a combination reverse dictionary and thesaurus site. When I typed a string of letters, OneLook found words that began with, contained, or ended with that string. I could also give OneLook gap-toothed strings, that is, combinations of letters and blanks, and OneLook would find possible combinations: all seven-letter words, say, that have A as their second letter and end with C. But my primary helper was XWord Info, which mines data from the entire New York Times crossword archives. XWord Info provides helpful options like bite-sized fragments of common speech that wouldn’t necessarily appear in a dictionary list (ARE TOO, AM SO, OR NOT). XWord Info also knows every clue that has been used for every answer to every past Times puzzle ever published, save a handful that were lost to posterity after newspaper strikes in the 1940s.
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Adrienne Raphel (Thinking Inside the Box: Adventures with Crosswords and the Puzzling People Who Can't Live Without Them)