Does anyone know of any other English word with three double letters in a row?

Frank

in spite of the usual lot of trivia answers, there are (arguably)
a few others.

-joe (who are we to argue) friday

M, you must be the most patient person I know. How, I don't know. Why, I do. Kudos, my friend.

Edit: Frank, that comment was not a reflection on your post; it was a good question.