Res-ur-rec-tion, adgyfodiad
Re-tal-i-ate, gwrthbwytho, dial cam
Ret-ri-bu-tion, atdal, atdaliad
Rev-e-la-tion, datguddiad, diargeliad
Re-verb-er-ate, gwrthdaro, dadseinio
Rev-o-lu-tion, chwyl, chwyldroad
Ri-dic-u-lous, chwerthinus; dirmygus
Ro-ta-to-ry, cylchawl, cylchdroawl
Ro-tun-di-ty, crynder, bolawd
Ru-in-a-tion, andwyad, dyfethiad