mourou mrambo mramor mrugam mrugua muamba mubuko mudbug muddar mudomo muduga mugarm muggar muggur muguga mugumu muguru mukkam mukoma mukugu mukuro mukuru mumbar mumbra muraba muraka murara muraro murbad murdak murdur murgod murgud murmur murram muruga muumuu oakura oamaru obambo obarok obdaga obdora oboama oborka obourg obubra obuda odadar odakra odmark ogakor ogarka ogbaru ogdoad ograda okbara okkadu okorag okumoo omagra omagua omakau ombro- omkara ookbad ookroo oooooo oordoo orbada orbara ordoru ormara ormrod oromoo orrour ouadda ouakam oud-aa ougard oumako raabau raagam rababa rabaud rabdo- rabkor rabodo rabuor radama radara radaur radbod radoma radour raduga radura ragada ragama ragbag ragmar ragrug rakugo ramada ramadu ramara ramark rambur ramdam ramord ramrod ramudu raraka rarog roadog robo-g robomb rodaba roddam rodgau rodora roduka rokkor rokuko rokuro romarm romour romrod roogoo roomba rorbua rragam rubarb rubbra rubgag rubro- rubrum rudaba rudbar rudgur rudoba rudram rudrur rugard rumaga rumbak rumbud rumbur rumdum rumoka rumour ubauro ubombo udburu udmaru udruma udukku ugboba ugramm ukamau ukbara umarga umauma ummaru umuaka urdoma urkkad uruagu uruara