b-room bbbbbb bobbos bombom bombur bombus booboo boom-o boorus borbor bormus boromo bororo bosoms bososo bossom bossou boubou bourou bousso boussu bousum bromo- bromos brooms brosso brubru brumus brusor bububu bumboo burbur burros bussum mbombo mbomou mommur moomoo morbus mormor mormos mormur moroso moross morous morros morsum mososo mossoo mouros mourou mousum murmur musmus mussum muumuu obosom obsorb ombro- oooooo orobus oromoo orrour osmous osommo ossous ououso ousrou robomb robous romoos romour rossum rubro- rubrum rumbur rumors rumour russo- russus rusumo sobos sombor soomro soosoo sorbus sorors sorous sorrus sorsor sorsum sourou sousou suburb summum sumoom sumoor sumuru suroso sursum surumu susumu susurr ubombo ubussu umbuss urobos