Aardvark and eel are words. They begin with double letters.
Raccoon is a word. It includes double letters in a row.
successfully
accessaccommodationsbrassinessbeefinessembarrasscoffeechildlessnesscarelessnesscoolnesscheerfullycrisscrossclasslesscommitteecommittedfussinessfootlessfearlessnessfootloosefoolishnesshellishnesshopelessnessheaddresshappinessjoblessnesslawlessnessmoonlessmessinesspuffinessprissinesspeevishnesspennilessraccoonruthlessnesssuccesssleeplesssloppinesssleevelessspookinessstuffinessstiffnessspeechlesssillinessscruffinesstoothlesstattootoffee
fettuccinehiccuppingoccurrencesuccessfulsuccessive
Aardvark and eel are words. They begin with double letters.
Raccoon is a word. It includes double letters in a row.
This question makes no sense. There are MANY words in which the letters are not followed by k. For instance, most of the words in this answer.
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successfully
accessaccommodationsbrassinessbeefinessembarrasscoffeechildlessnesscarelessnesscoolnesscheerfullycrisscrossclasslesscommitteecommittedfussinessfootlessfearlessnessfootloosefoolishnesshellishnesshopelessnessheaddresshappinessjoblessnesslawlessnessmoonlessmessinesspuffinessprissinesspeevishnesspennilessraccoonruthlessnesssuccesssleeplesssloppinesssleevelessspookinessstuffinessstiffnessspeechlesssillinessscruffinesstoothlesstattootoffee
fettuccinehiccuppingoccurrencesuccessfulsuccessive
addassallillofferrbeeseefeepeeteeweezooboocoogoomootoooddebb
bookkeeper
Hawaii
baddestbiggesthottestfattestfittestflattestgladdestglibbestgrimmestmaddestsaddestslimmestsmuggestthinnesttrimmest
Llama