b-room bbbbbb boccob bogoro bombom bombur booboo boogum boom-o borbor borogo boromo bororo boubou bougou bourou brocco brocor bromo- brubru bububu bucco- bugbug bumboo burbur burgoo burgor burgum c-bomb cobbob coburg cocco- cococo cocomo comcom comobo comoro coocoo cormo- cormor corour coruco coruro courbu courr- crocco cruro- cucurb cumbum curmur curour curror cururo gobbur goboom gogoro googoo gooroo gorgor gourou grugru gubgub gurbru gurgum gurugu mbombo mbomou mccomb mccrum mcrobb mococo mogoro mommur moogoo moomoo morcom mormor mormur moroco morogo mourou muggur mugumu muguru murmur muumuu obourg occour ombro- oooooo oromoo orrour rcrumb robo-g robomb rococo romcom romour roogoo roucou rubro- rubrum rumbur rumour ruocco ubombo ucurum