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.
chordsscoresscornsshoresstoresstorksstormsswordsthorns
Words with IE in the middle:dieddiesdietliedliespierpiespriesttiedtierties
"Double letters" means two in a row, like tt in "letter" or oo, kk, and ee in "bookkeeper".
OMELETTE
sauce
buckknife
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
Cobra