Top Ten Words of 2004

I see that Merriam-Webster has just announced the Words of the Year 2004. In other words, these are the words most frequently looked up online, at the Merriam-Webster site. (Because I know you'll ask, #1 on the list was "blog," followed by "incumbent" and "electoral." One can imagine why those words ended up on the list, and I assume that "peloton" shows up because of the Tour de France.

But riddle me this: why in the heck did "defenestration" make #10?