Canopy
There are many words that have 3 consecutive letters in them. define erstwhile stump
Define.Nope.First.Stupid.
Afghanistan.
bookkeeper
The English word BOOKKEEPING or BOOKKEEPER has three sets of consecutive double letters. SUBBOOKKEEPER is the only word with four sets of consecutive double letters, although these words should be hyphenated.
Mississippi
bookkeeping
bookkeeper
the musical instrument saxophone
Hazar-dedHazar-derHazar-diaHazar-dry
If you mean consecutive letters, than bookkeeperfits. Otherwise, I have no idea.
The only one I can think of is bookkeeper. Are there others?