Seeing Seeing Double?

The other day on the show we discussed words with consecutive sets of double letters. A caller pointed out that bookkeeper has three sets. My co-host noted that subbookkeeper has four. Arthur Salazar just emailed to suggest a word with an even longer string of double letters -- a word that denotes "people who maintain the small spaces where masked mammals live in the zoo." Says Arthur: "They are called raccoonnookkeepers."

Okay, so it's not in a dictionary, but it's pretty great. Can anybody top that one?