hadden ahdden hdaden dhaden adhden dahden hadden ahdden hdaden dhaden adhden dahden hddaen dhdaen hddaen dhdaen ddhaen ddhaen addhen dadhen addhen dadhen ddahen ddahen hadedn ahdedn hdaedn dhaedn adhedn dahedn haeddn aheddn headdn ehaddn aehddn eahddn hdeadn dheadn hedadn ehdadn dehadn edhadn adehdn daehdn aedhdn eadhdn deahdn edahdn hadedn ahdedn hdaedn dhaedn adhedn dahedn haeddn aheddn headdn ehaddn aehddn eahddn hdeadn dheadn hedadn ehdadn dehadn edhadn adehdn daehdn aedhdn eadhdn deahdn edahdn hddean dhdean hddean dhdean ddhean ddhean hdedan dhedan heddan ehddan dehdan edhdan hdedan dhedan heddan ehddan dehdan edhdan ddehan ddehan dedhan eddhan dedhan eddhan addehn dadehn addehn dadehn ddaehn ddaehn adedhn daedhn aeddhn eaddhn deadhn edadhn adedhn daedhn aeddhn eaddhn deadhn edadhn ddeahn ddeahn dedahn eddahn dedahn eddahn haddne ahddne hdadne dhadne adhdne dahdne haddne ahddne hdadne dhadne adhdne dahdne hddane dhdane hddane dhdane ddhane ddhane addhne dadhne addhne dadhne ddahne ddahne hadnde ahdnde hdande dhande adhnde dahnde handde ahndde hnadde nhadde anhdde nahdde hdnade dhnade hndade nhdade dnhade ndhade adnhde danhde andhde nadhde dnahde ndahde hadnde ahdnde hdande dhande adhnde dahnde handde ahndde hnadde nhadde anhdde nahdde hdnade dhnade hndade nhdade dnhade ndhade adnhde danhde andhde nadhde dnahde ndahde hddnae dhdnae hddnae dhdnae ddhnae ddhnae hdndae dhndae hnddae nhddae dnhdae ndhdae hdndae dhndae hnddae nhddae dnhdae ndhdae ddnhae ddnhae dndhae nddhae dndhae nddhae addnhe dadnhe addnhe dadnhe ddanhe ddanhe adndhe dandhe anddhe naddhe dnadhe ndadhe adndhe dandhe anddhe naddhe dnadhe ndadhe ddnahe ddnahe dndahe nddahe dndahe nddahe hadend ahdend hdaend dhaend adhend dahend haednd ahednd headnd ehadnd aehdnd eahdnd hdeand dheand hedand ehdand dehand edhand adehnd daehnd aedhnd eadhnd deahnd edahnd hadned ahdned hdaned dhaned adhned dahned handed ahnded hnaded nhaded anhded nahded hdnaed dhnaed hndaed nhdaed dnhaed ndhaed adnhed danhed andhed nadhed dnahed ndahed haendd ahendd heandd ehandd aehndd eahndd hanedd ahnedd hnaedd nhaedd anhedd nahedd henadd ehnadd hneadd nheadd enhadd nehadd aenhdd eanhdd anehdd naehdd enahdd neahdd hdenad dhenad hednad ehdnad dehnad edhnad hdnead dhnead hndead nhdead dnhead ndhead hendad ehndad hnedad nhedad enhdad nehdad denhad ednhad dnehad ndehad endhad nedhad adenhd daenhd aednhd eadnhd deanhd edanhd adnehd danehd andehd nadehd dnaehd ndaehd aendhd eandhd anedhd naedhd enadhd neadhd denahd ednahd dneahd ndeahd endahd nedahd hadend ahdend hdaend dhaend adhend dahend haednd ahednd headnd ehadnd aehdnd eahdnd hdeand dheand hedand ehdand dehand edhand adehnd daehnd aedhnd eadhnd deahnd edahnd hadned ahdned hdaned dhaned adhned dahned handed ahnded hnaded nhaded anhded nahded hdnaed dhnaed hndaed nhdaed dnhaed ndhaed adnhed danhed andhed nadhed dnahed ndahed haendd ahendd heandd ehandd aehndd eahndd hanedd ahnedd hnaedd nhaedd anhedd nahedd henadd ehnadd hneadd nheadd enhadd nehadd aenhdd eanhdd anehdd naehdd enahdd neahdd hdenad dhenad hednad ehdnad dehnad edhnad hdnead dhnead hndead nhdead dnhead ndhead hendad ehndad hnedad nhedad enhdad nehdad denhad ednhad dnehad ndehad endhad nedhad adenhd daenhd aednhd eadnhd deanhd edanhd adnehd danehd andehd nadehd dnaehd ndaehd aendhd eandhd anedhd naedhd enadhd neadhd denahd ednahd dneahd ndeahd endahd nedahd hddena dhdena hddena dhdena ddhena ddhena hdedna dhedna heddna ehddna dehdna edhdna hdedna dhedna heddna ehddna dehdna edhdna ddehna ddehna dedhna eddhna dedhna eddhna hddnea dhdnea hddnea dhdnea ddhnea ddhnea hdndea dhndea hnddea nhddea dnhdea ndhdea hdndea dhndea hnddea nhddea dnhdea ndhdea ddnhea ddnhea dndhea nddhea dndhea nddhea hdenda dhenda hednda ehdnda dehnda edhnda hdneda dhneda hndeda nhdeda dnheda ndheda hendda ehndda hnedda nhedda enhdda nehdda denhda ednhda dnehda ndehda endhda nedhda hdenda dhenda hednda ehdnda dehnda edhnda hdneda dhneda hndeda nhdeda dnheda ndheda hendda ehndda hnedda nhedda enhdda nehdda denhda ednhda dnehda ndehda endhda nedhda ddenha ddenha dednha eddnha dednha eddnha ddneha ddneha dndeha nddeha dndeha nddeha dendha edndha dnedha ndedha enddha neddha dendha edndha dnedha ndedha enddha neddha addenh dadenh addenh dadenh ddaenh ddaenh adednh daednh aeddnh eaddnh deadnh edadnh adednh daednh aeddnh eaddnh deadnh edadnh ddeanh ddeanh dedanh eddanh dedanh eddanh addneh dadneh addneh dadneh ddaneh ddaneh adndeh dandeh anddeh naddeh dnadeh ndadeh adndeh dandeh anddeh naddeh dnadeh ndadeh ddnaeh ddnaeh dndaeh nddaeh dndaeh nddaeh adendh daendh aedndh eadndh deandh edandh adnedh danedh andedh nadedh dnaedh ndaedh aenddh eanddh aneddh naeddh enaddh neaddh denadh ednadh dneadh ndeadh endadh nedadh adendh daendh aedndh eadndh deandh edandh adnedh danedh andedh nadedh dnaedh ndaedh aenddh eanddh aneddh naeddh enaddh neaddh denadh ednadh dneadh ndeadh endadh nedadh ddenah ddenah dednah eddnah dednah eddnah ddneah ddneah dndeah nddeah dndeah nddeah dendah edndah dnedah ndedah enddah neddah dendah edndah dnedah ndedah enddah neddah
Note: these 'words' (valid or invalid) are all the permutations of the word hadden. These words are obtained by scrambling the letters in hadden.