omulno onagga onagon onagra onalog onanon onaral onarga onarun ongang ongaro ongoal onloan onnara onogur onroll onuora oolala oolong oooooo orallo oraman oranga orango orgall organ- organa organo ormara ormolu ornago ornana oromoo orongo orraon orrour ouanga ouango oulong ouolon ourang ourman ouroun r-mall raagam ragala ragama ragana raggal raglan ragman ragmar ragnar ragol ragrug ram-on ramala ramana ramang ramara ramaul ramman rammun ramona ramoon ramuan ranala ranana rangal rangam rangan rangra ranong ranula rarog rogala roggan rognan rognon rogolo rollag rollan rollar rollon romana romang romano romanu romarm romola romolo romour romula romulo ronago rongan ronggo ronglu rongma ronnon ronron roogoo roomal rooman roomon rougon rouman rounou rragam rugola rugolo rugula rulong rumaal rumaga rumana rumlar rumman rumour rumung run-on runamo ruurlo ugalla ugallu ugramm uguana uguano ugurlu ulanga ulaula ullalu ullman ulloor ulmann umagon umarga umauma umgang ummaru umunna umurlu un-man ungang ungaro ungogo ungual unguan ungula ungull unguma unlull unmoan unmoar unmoor unoral unroll unrung uoaman uragan uraman uranga urano- urgull urnula uruagu uruana uruara