reace reack reake rear- reaue rebab rebak rebar rebbe rebec reber rebra recca recce recco recea recka recke recue recur reece reere rekka rekke rekoa rere- reree rerob reuar reuer ro-ro roabe roark roaue robab robak robar robbe robbo robec rober robo- robor robur rocar rocca rocco rocka rocke rocko rocoa rocor rocou roera roero rokee roker rokke rokkk rokua rooba rooer rooke roore rooue rorbu rorer rorke rorra rouba rouer rouke rouko roura roure ruaka ruark rubab rubba rubee ruber rubke rubor rubra rucer rucka rueca ruere rukke rurak rurec rurka u-cee uacrr uaroo uber- ubobo uceku ucero ukaea ukeke ukobu uouee uraba urare urbar urea- ureae ureo- urera urker uroob urour urrao urrea urubu uruce urucu uuork uuuuu