-tree c-cor c-tec ccccc ccett ceco- ceere cefcu cefor ceoce ceoor cerc- cerce cerco cerec cerer ceret cerke cero- ceroc cerou cerre cerro certe ceto- cette cfour cfu-e co-co cocc- cocce cocco coceo cocke cockt cocto cocur coete coeur cofer coffe cofre cofur coker coket cokk- cokot cooee cooer cooke cookt coore coote corce core- coree corer coreu corfe corfo corfu corke coro- corot corre corte corto coter cott- cotte cotto cottu couco couer coure court couru couto coutu crece creek creer creft creke creo- creot crete cretu creu- creue croce crock croco croft croke crokt crooe crook croot crore crote crott crouk crout cruce cruck cruet crufe cruft cruke cruor crure ctree cttee cucuk cuero cueto cufeu cuffe cufre cuker cukor cuoco cuore curce curer curet curre curro curto cutco cutcu cutee cuter cutro cutto ecker ecoff ectfe ecto- ector ectot eecke eeeee ef-tu efere efetf effer effet efore efter efuru efutu ekeko ekker ektor ekuku ekuru eofor eorre erect erere erkec erkko erkoc eroor erore eroto error errtu erte erter eruct eruke eteke etete etoko etoro etour etree etrek etter eturu eucre euro- eurre feeor feere fefor feock feoff ferce feret ferr- ferre ferro ferte feter feto- fetor fette feuer feute focer focke fokke fokto foore foote force fore- foreo foret forro forte forto forur fotte fotur fouee fouet fouke foure fouro freck freek freer freet freke frere frett freur frock froot frore frote fruct fruko frute fruto ftrtt fu-fu fucko fuco- fuero fuoco furo- furor futur k-ute kecer keefe keere kefee kekec kerek keret kerre kertu ketek keter keto- ketou kette ketto ko-ko kocek kocer kocke koeru kofte koker koket kokko kokor kokot kokou kokre kokur kokut kooru korck korec korek korff korke korku koror korro korte kortu korue koruk kotor kotto kottu kotur kouer koufu koure kouto kre-o kreef kreek kreke kreo- krete kreuk krock kroft kroke kroot krout krtok krufc kruft kruto kucer kucuk kukec kukko kukok kukur kurek kurku kurre kurte kuruc kuruk kutte kuttu kutur o-fer occur ocftc ocker ockro ocoee ocote ocree octet octo- octor oeco- offek offer offof offre offto ofoto ofour ofter okeke okere oketo okker okkur okoc okoro okrut okuku okuru oo-er oocre ooooo orcet oreck oreco oreo- orere orero orfeo orfeu orfoe orfor orkut oroco oroer oroke orout orret orter ortet ortok ortoo oruce oruku oruro orutu otere otero otoce otoku ototo otour otrok otter ottur otuke oture ouert ouoro ource oure- outer outof outre outro outto r-co- recce recco recet recke rect- recte recto recue recur recut reece reefe reeft reere refco refer refet reffe reffo refut rekke rere- reree reret retee reter retro rette retto reuer reuet reute ro-ro rocco rocke rocko rocor rocou roero roffe rofor rokee roker roket rokke rokkk rokot rokto rooer roofe rooft rooke roore roote rooue rorer rorke roter rotko roto- rotor rotot rotte rotto rouer rouet roufe rouke rouko roure route routt rt-rk rucer ruere ruete ruffe ruffo rufo- rukke rurec ruter rutte ruutu tcutk tecou teeko tefe teket tekke tekko teoco terce terco terek teret tereu terok teror terre terro tert- teruo teter tetr- tetro tette teuto tocco toco- tocut toece toeof toerr toeto tofet toffo tofor tofte toker tokke tokko toko- tokor tokuo tokur tooke toore torce toreo toret torke torok torre torro torte torto tortu torue toter toto- totoe totok totoo totte touck touke toure touro toute treck treco treer treet trefe treff trere trete trett treut trock troco troee trofe troff troft troke trott troue trout truce truck truco truer truff truke truro trute tteok ttttt tucet tucke tuctu tuero tuffe tufte tukur tuotu turck turco turek turet turko turku turoc turok turot turre turro turtu turut tutee tuteo tutku tutor tutte tutto tuuru u-cee uceku ucero ufere ufofu ukeke ukert uouee ureo- urker urkut urour urter uruce urucu urutu uter- utero utro- utror utter uttur uturu ututo uuork uuuuu