unfold nufold ufnold funold nfuold fnuold unofld nuofld uonfld ounfld noufld onufld ufonld fuonld uofnld oufnld founld ofunld nfould fnould nofuld onfuld fonuld ofnuld unflod nuflod ufnlod funlod nfulod fnulod unlfod nulfod ulnfod lunfod nlufod lnufod uflnod fulnod ulfnod lufnod flunod lfunod nfluod fnluod nlfuod lnfuod flnuod lfnuod unolfd nuolfd uonlfd ounlfd noulfd onulfd unlofd nulofd ulnofd lunofd nluofd lnuofd uolnfd oulnfd ulonfd luonfd olunfd lounfd nolufd onlufd nloufd lnoufd olnufd lonufd ufolnd fuolnd uoflnd ouflnd foulnd ofulnd uflond fulond ulfond lufond fluond lfuond uolfnd oulfnd ulofnd luofnd olufnd loufnd folund oflund flound lfound olfund lofund nfolud fnolud noflud onflud fonlud ofnlud nfloud fnloud nlfoud lnfoud flnoud lfnoud nolfud onlfud nlofud lnofud olnfud lonfud folnud oflnud flonud lfonud olfnud lofnud unfodl nufodl ufnodl funodl nfuodl fnuodl unofdl nuofdl uonfdl ounfdl noufdl onufdl ufondl fuondl uofndl oufndl foundl ofundl nfoudl fnoudl nofudl onfudl fonudl ofnudl unfdol nufdol ufndol fundol nfudol fnudol undfol nudfol udnfol dunfol ndufol dnufol ufdnol fudnol udfnol dufnol fdunol dfunol nfduol fnduol ndfuol dnfuol fdnuol dfnuol unodfl nuodfl uondfl oundfl noudfl onudfl undofl nudofl udnofl dunofl nduofl dnuofl uodnfl oudnfl udonfl duonfl odunfl dounfl nodufl ondufl ndoufl dnoufl odnufl donufl ufodnl fuodnl uofdnl oufdnl foudnl ofudnl ufdonl fudonl udfonl dufonl fduonl dfuonl uodfnl oudfnl udofnl duofnl odufnl doufnl fodunl ofdunl fdounl dfounl odfunl dofunl nfodul fnodul nofdul onfdul fondul ofndul nfdoul fndoul ndfoul dnfoul fdnoul dfnoul nodful ondful ndoful dnoful odnful donful fodnul ofdnul fdonul dfonul odfnul dofnul unfldo nufldo ufnldo funldo nfuldo fnuldo unlfdo nulfdo ulnfdo lunfdo nlufdo lnufdo uflndo fulndo ulfndo lufndo flundo lfundo nfludo fnludo nlfudo lnfudo flnudo lfnudo unfdlo nufdlo ufndlo fundlo nfudlo fnudlo undflo nudflo udnflo dunflo nduflo dnuflo ufdnlo fudnlo udfnlo dufnlo fdunlo dfunlo nfdulo fndulo ndfulo dnfulo fdnulo dfnulo unldfo nuldfo ulndfo lundfo nludfo lnudfo undlfo nudlfo udnlfo dunlfo ndulfo dnulfo uldnfo ludnfo udlnfo dulnfo ldunfo dlunfo nldufo lndufo ndlufo dnlufo ldnufo dlnufo ufldno fuldno ulfdno lufdno fludno lfudno ufdlno fudlno udflno duflno fdulno dfulno uldfno ludfno udlfno dulfno ldufno dlufno flduno lfduno fdluno dfluno ldfuno dlfuno nflduo fnlduo nlfduo lnfduo flnduo lfnduo nfdluo fndluo ndfluo dnfluo fdnluo dfnluo nldfuo lndfuo ndlfuo dnlfuo ldnfuo dlnfuo fldnuo lfdnuo fdlnuo dflnuo ldfnuo dlfnuo unoldf nuoldf uonldf ounldf nouldf onuldf unlodf nulodf ulnodf lunodf nluodf lnuodf uolndf oulndf ulondf luondf olundf loundf noludf onludf nloudf lnoudf olnudf lonudf unodlf nuodlf uondlf oundlf noudlf onudlf undolf nudolf udnolf dunolf nduolf dnuolf uodnlf oudnlf udonlf duonlf odunlf dounlf nodulf ondulf ndoulf dnoulf odnulf donulf unldof nuldof ulndof lundof nludof lnudof undlof nudlof udnlof dunlof ndulof dnulof uldnof ludnof udlnof dulnof ldunof dlunof nlduof lnduof ndluof dnluof ldnuof dlnuof uoldnf ouldnf ulodnf luodnf oludnf loudnf uodlnf oudlnf udolnf duolnf odulnf doulnf uldonf ludonf udlonf dulonf lduonf dluonf oldunf lodunf odlunf dolunf ldounf dlounf nolduf onlduf nloduf lnoduf olnduf londuf nodluf ondluf ndoluf dnoluf odnluf donluf nldouf lndouf ndlouf dnlouf ldnouf dlnouf oldnuf lodnuf odlnuf dolnuf ldonuf dlonuf ufoldn fuoldn uofldn oufldn fouldn ofuldn uflodn fulodn ulfodn lufodn fluodn lfuodn uolfdn oulfdn ulofdn luofdn olufdn loufdn foludn ofludn floudn lfoudn olfudn lofudn ufodln fuodln uofdln oufdln foudln ofudln ufdoln fudoln udfoln dufoln fduoln dfuoln uodfln oudfln udofln duofln odufln doufln foduln ofduln fdouln dfouln odfuln dofuln ufldon fuldon ulfdon lufdon fludon lfudon ufdlon fudlon udflon duflon fdulon dfulon uldfon ludfon udlfon dulfon ldufon dlufon flduon lfduon fdluon dfluon ldfuon dlfuon uoldfn ouldfn ulodfn luodfn oludfn loudfn uodlfn oudlfn udolfn duolfn odulfn doulfn uldofn ludofn udlofn dulofn lduofn dluofn oldufn lodufn odlufn dolufn ldoufn dloufn foldun ofldun flodun lfodun olfdun lofdun fodlun ofdlun fdolun dfolun odflun doflun fldoun lfdoun fdloun dfloun ldfoun dlfoun oldfun lodfun odlfun dolfun ldofun dlofun nfoldu fnoldu nofldu onfldu fonldu ofnldu nflodu fnlodu nlfodu lnfodu flnodu lfnodu nolfdu onlfdu nlofdu lnofdu olnfdu lonfdu folndu oflndu flondu lfondu olfndu lofndu nfodlu fnodlu nofdlu onfdlu fondlu ofndlu nfdolu fndolu ndfolu dnfolu fdnolu dfnolu nodflu ondflu ndoflu dnoflu odnflu donflu fodnlu ofdnlu fdonlu dfonlu odfnlu dofnlu nfldou fnldou nlfdou lnfdou flndou lfndou nfdlou fndlou ndflou dnflou fdnlou dfnlou nldfou lndfou ndlfou dnlfou ldnfou dlnfou fldnou lfdnou fdlnou dflnou ldfnou dlfnou noldfu onldfu nlodfu lnodfu olndfu londfu nodlfu ondlfu ndolfu dnolfu odnlfu donlfu nldofu lndofu ndlofu dnlofu ldnofu dlnofu oldnfu lodnfu odlnfu dolnfu ldonfu dlonfu foldnu ofldnu flodnu lfodnu olfdnu lofdnu fodlnu ofdlnu fdolnu dfolnu odflnu doflnu fldonu lfdonu fdlonu dflonu ldfonu dlfonu oldfnu lodfnu odlfnu dolfnu ldofnu dlofnu
Note: these 'words' (valid or invalid) are all the permutations of the word unfold. These words are obtained by scrambling the letters in unfold.