They're simply words with six letters beginning in e and ending in you.
Some six letter words ending in I are:alkalialumnibanzaibikinikabukipirogisafariscampiwasabi
6 letter words starting and ending with N:napkinnationneuronnotion
Actionacumen attain
Some six letter words ending in K are:attackdamaskembarkhijackremarkshriekshrink
They're simply words with six letters beginning in e and ending in you.
killer, kilter, kisser
Some six letter words ending in I are:alkalialumnibanzaibikinikabukipirogisafariscampiwasabi
Some six letter words ending in U are:bureaugateaulandaumilieumuumuu
Ethers, esters, eaters, extras, equals, edgar's, and eagles.
6 letter words starting and ending with N:napkinnationneuronnotion
Actionacumen attain
Some six letter words ending in K are:attackdamaskembarkhijackremarkshriekshrink
6 letter f words ending with e:fiddlefacadefaminefeeblefoiblefelineficklefigurefinalefizzlefleecefondleforageforseefutilefreezefringefumble
a 6 letter word ending with a w is borrow.
Some six letter words beginning with e are:eatingerodesearwigearwaxelopedeitherextortexertsemesisemulgeeponymeagletearfulequate
Some six letter words starting with A and ending with L are:actualassailanimalartfularmfulannual