b-room bbbbbb bhoomi bibiri bibiru biobor biomom birhor biribi birohi birori bo-hoo bobbio bobiri bombom bombur booboo boohoo boom-o borbor borium bormio boromo bororo boubou bourou bribir bribri brimir bromio bromo- brubru bubbio bububu bumboo burbur burhou burior buriro burrio bururi h-bomb h-hour hibhib himroo hirobo hirohi hiroim hiromi hiromu ho-hum hohoho homoi- hoohoo hooroo hororo horror hubbub hububb huh-uh humhub humhum humiri hummum humour hurroo hurumu ibibio ibrium iiooio imirim irrour mbombo mbomou miburi mihiro mihoub mimori miombo miomir mirihi miroir mirour mirror mirumo miruru mm-hmm mohoro mohuhu mommur momoir moomoo moormi morbio moribi moriro mormor mormur moroii mourou muhuhu muhurr muhuru murio- murium murmir murmur muumuu ohohoh ombro- omoio- oohooh oooooo oriomo ormuri orobii oromoo orrho- orrour ouioui rhomb- rhombi rimbor rirumu robbio robomb rohmir romiri romour rubro- rubrum ruhroh ruhubi rumbur rumohr rumour ubombo uburoi uh-huh um-hum umirim urhobo