kocer kochu kocke kocul koech koehl koeru kofel kohlu kohol kokel koker kokko kokle kokor kokou kokre kokur kolbe kolbu kolce kolec kolek kolel koler kolff kolho kolle kollo kollu kolob kolol kolur koolu kooru korbe korbo korck korec koreh korek korel korff korke korku korol koror korro korue koruk kouch kouel kouer koufu koule koulo koure kre-o kreef kreek kreel krehl kreke krele krell kreo- kreol kreuk krock kroke krole kroll krufc krull kubek kuber kubok kubul kucer kuche kuchl kuchu kucuk kuehl kuheh kuhle kukec kukel kukko kukle kukok kukur kullo kullu kulob kulor kulul kulur kurbu kurch kureh kurek kurku kurlu kurre kuruc kuruk lebce lebec lebel leber lecce lecco leche leece leech leeco leeke leell leeof leere lefeu leffe lefko lefou leful lehel leheo lehre lekel lekeu lekor leleu lelle lerch lerer leroc leuc- leuce leuch leuco leuk- leuke leuko leuro lheuc lhoke lluch lobbe lobbo lobec lober loble lobo- lobor loche locho lockb locke loco- locro lofer loffe lofou lohho lohur loker lokke lokur loler lollo lolol loobu looce looch loock looer looke lookf loore lorch lorck lorel loreo lorer lorke lorre loruk louce louch louer louke loule loure louro lubbe luber lubke luble lubok lubur lucee luche luchu lucke lucko lucre lucur luebo lufre luker lukho lukko lukok lukou lukre lulec luleh lulle luluc lulul luohe luoke lurch lurck lurer lurue o-fer o-r-b obele obhor obock obole obolo oboro oboue obreb obrok occur ocelo ocher ochl- ochre ochro ocker ockle ockro ocllo ocoee ocr-b ocree ocul- oculo oeco- oerel oerle offek offer offof offre ofher ofour oh-oh oh-ok ohchr ohelo ohfoo ohler ohour ohrob okcho okeke okelo okere okfol okhre okker okkur oklee okobo okoc okoho okole okoro okubo okuku okuru oleku oleo- olere olleo oller ollur olour oo-er oocre ooher ooooh ooooo orbec orble orech oreck oreco orell oreo- orere orero orfeh orfeo orfeu orfoe orfor orful orhel orkel orlec orlek orlok orobe orobo oroch oroco oroer oroke orolu orube oruce oruch oruku oruro ouche oucho oullo ouoro ource oure- ourol r-co- rcolo rebbe rebec rebel reber rebol recce recco reche recke recue recur reece reech reefe reere reerh refco refel refer reffe reffo rehco reher rehoe rehue rekel rekke rekle relee relek relko rello relue rere- reree rerob reuel reuer reule rheo- rhoeo ro-ro robbe robbo robec rober roble robo- robor robur rocco roche rocke rocko rocor rocou roell roero rofel roffe rofor rohel rohff rohle rohob rohru rokee roker rokke rokkk rokle roleo rolfe rolfo rollc rolle rollo rolok rooer roofe rooke rookh roole roore rooue rorbu rorer rorke rouch rouer roufe rouhe rouke rouko roule roulk roull roure rubee rubel ruber rubke ruble rubof rubor rucer ruche rucul ruehl ruele ruell ruere ruffe ruffo rufo- rufol ruhle ruhub rukel rukke ruler rullo rurec ruule u-cee ubble uber- ubobo uccel uccle uceku ucell ucero uchee ucheh uchku uchuu uclue uelfe ufere ufofu uforb uh-ee uh-oh uh-uh uhecr uhhoh uhhuh uhler uhuru ukeke ukobu ulcer ulche ulker ullur ulock ululu uluru uouee urcel urech urelu ureo- urkel urker uroob urour urubu uruce urucu uuork uuuuu