The word "bookkeeper" fits this description. It ends with a double "r" and also has two different double letters in it, which are "oo" and "ee."
cOOEE
coffeetoffeecommittee
whiff, wahoo, whirr
Necessary.
PEE ZOO See Too Pooaddallassboocooebbeggerrfeegooheeillinnmoooddoffteewee
I'm a bit confused by the question. If you are looking for a word that fits that try bassoon
Successfully is a 12 letter word with three set of double letters. Stubbornness is another 12 letter word.
accessoryaddressaggressiveannuallyappallassessassassinbitternessbuccaneerblurrinessbulletproofbutterballbuttresscassettecarelessnesscarryallcoffeecommissarycommissioncrabbinessfurrinesshappinesspennilesspuffinessruddinesssluggishnessstiffnessstillnessstubbornnessstuffinesssuccesstallnessvolleyballwellnesswheelbarrow
3 letter words ending with double letters: * add * ass * all * bee * boo * coo * ebb * egg * err * fee * ill * moo * odd * off * see * too * tee * wee * zoo
ConnecticutMinnesotaPennsylvaniaMassachusettsHawaiiMissouriMississippiIllinois
Raccoon is a word. It includes double letters in a row.
Aardvark and eel are words. They begin with double letters.