Words with repeating letters (comment based quiz)

List words that have the same 2 letters repeating more than four times. I have thought of a few words myself, the rest will be made by comments posted on this quiz https://www.jetpunk.com/create-quiz/edit-quiz/1158756 Words can have the same letter twice then another letter then that letter, and it doesn't just have to be repeating letters. For example: a word that has "aaoa" as part of its spelling would be accepted, and so would words with something like "aoao". I came up with a few myself. Some may have this case occuring more than once. May also be geograpic locations
Quiz by IneedasHower
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Last updated: November 1, 2017
First submittedOctober 31, 2017
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Answer
Hippopotamus
Bookkeeper
Poop
Opportunity
Appalachian
Opposing
Opposite
Cucumber
Opposition
Deed
Opposed
Cocoa
Cacao
Difficult
Difficulties
Diffident
Azaz
Honolulu
Noon
Jujube
Assasin
+2
Level 40
Mar 15, 2018
Bad Quiz! Make it Better!""
+1
Level 33
Sep 10, 2018
How should I?