A real word is trekker, a slang word is likker.
Bookkeeper and jackknife are words. They contain the letters kk.
These letters can be rearranged to spell the country Germany. The next longest words from these letters include German and manger.
Words with IE in the middle:dieddiesdietliedliespierpiespriesttiedtierties
sauce
Some six letter words with FF in the middle are:wafflebafflebufferduffermufflepifflesufferduffelpuffindiffer
Bookkeeper and jackknife are words. They contain the letters kk.
These letters can be rearranged to spell the country Germany. The next longest words from these letters include German and manger.
One of the longest words with double letters is "bookkeeper," which has three sets of double letters (oo, kk, ee). Another contender is "bookkeeping," which also features the same double letters. Both words are commonly cited in discussions about words with repeating letters.
chordsscoresscornsshoresstoresstorksstormsswordsthorns
"Double letters" means two in a row, like tt in "letter" or oo, kk, and ee in "bookkeeper".
Words with IE in the middle:dieddiesdietliedliespierpiespriesttiedtierties
buckknife
sauce
OMELETTE
Words with "te" in the middle:litersmeters
Some six letter words with FF in the middle are:wafflebafflebufferduffermufflepifflesufferduffelpuffindiffer
Some words that have the letters ME twice in the middle are:amendmentcommencementdismembermentmeantimemeasurementmementomerrimentmesmerisemetronomesometimesummertime