got it in one(1), agent96. and now, the rest of the story:

recall that the book from which this was culled describes the world of competitive Scrabble®. Scrabble players are prone to exercising their minds by taking a set of letters and unscrambling them to make words. first, they make an alphagram, the alphabetical sequencing of the letters.
this particular alphagram is a special case called an isogram, in that it has no repeating letters. It also happens to be the longest isogram in MW10, which is the official Scrabble source for words longer than 10 letters (the Official Scrabble Dictionary, Third Edition is used otherwise).

so that's how it got in Word Freak....