orolu oroua orube oruro ouara ouera oullo ouoro oural ourba oure- ourea ourol ra-ra raaba raabe raahe raaor rabab rabah rabal rabba rabbe rabeh rabel rabha rable rabor rabou rabul raela rahab rahal raheb rahul ralla ralle rallo raoul rarae rareb raree rarer reale realo rear- reaue rebab rebar rebbe rebel reber rebol rebra reere reerh rehab rehal rehar rehau reher rehoe rehua rehue relau relee rella rello relue reola rere- reree rerob reuar reuel reuer reule rharb rheae rheo- rhoeo ro-ro roabe roale roall roaue robab robar robbe robbo rober roble robo- robor robur roela roell roera roero rohal rohel rohle rohob rohru rolao roleo rolla rolle rollo rolua rooah rooba rooer roole roore rooue roral rorbu rorer rorra rouba rouer rouhe roule roull roura roure rrhea ruaha ruala rubab rubba rubee rubel ruber ruble rubor rubra ruehl ruele ruell ruere ruhab ruhla ruhle ruhub ruler rullo rural ruule uaroo ubble uber- ubobo uh-ee uh-oh uh-uh uhaul uhhoh uhhuh uhler uhura uhuru ulala ulalu ulbra ullah ullal ullar ulloa ullur ulula ululu uluru uolba uouee uraba uralo urare urbar urea- ureae ureal urelu ureo- urera urlar urola uroob urour urrao urrea urubu uuuuu