-form bbbee be-er be-ro beber beebe beeve beffe befoe befor bembe bembo bemer beofe beoff berbe berme bermo berob beroe berom beror berre bever bevor bo-bo bobov bobr bobre boeme boero boffo bombe bombo bomer bomme booer boomb boomf boore borbo boree borer bormo boro- borom boroo borov borre borro borve borvo bovee breef breem breer breme bremm bremo breo- brere breve brmmm brobo broer brom- brome bromo broom brrrr ebber eeeee eevee eever efere effer efore efrem embee ember embro emeer emere emmer emore emove eofor eomer eorre erbbe erber erem- eremo erere ereve erome eroom eroor erore error eveof evere evero everr eveve evome evoor fbomb febre feeme feeor feere fefor femme femoe feoff feorm ferme fermo ferr- ferre ferro fever fevre fomor foome foore fore- foreo form- forme forro forvm forvo freer freme fremm frere frevo frobe frome fromm froom frore mbebe mbere mboro mebbe meebo meefe meere meeve mefor membe memer memor merer mero- meroe merom meroo meror merre merve mmfbm mmmmm mobee mobme mobor mobro moeer moeme moere moero moeve moffe moffo mombo momme momoe mooer moore mooro moove morbo moree morem morer morev mormo moror morre morro mover mrmom mroof mrorr o-fer o-r-b oboro obreb obrom obrov oerme ofeve offer offof offre ombe- omber ombre omemo omero omore omoro oo-er oofem ooooo oovoo orbom oreo- orere orero orfeo orfoe orfor ormer orobe orobo oroer orome oromo over- overo rebbe reber reefe reeme reemo reere reeve refer reffe reffo refme remee remer remor reome rere- reree rerob rever revfm ro-ro robbe robbo rober robo- robor roero roffe rofor rombe romeo romer romfo romme rooer roofe roome roore roove rorem rorer rover v-bob v-bor veber vebre veere veeve verbo vereb verme vermo verre verve veveo vever voere vomer voore vorbe vorfe vorme vorre vrbov vreme vromb vroom