Rit-u-al, defodlyfr; defodol
Ri-val-ry, cydymgais
Riv-u-let, nant, cornant
Ro-ga-tion, gofyniad, gwedd
Ro-man-tic, aruthrol; ffugiol
Ro-ta-tion, chwyliad, chwyldroad
Roy-al-ty, brenindod, teyrnogaeth
Ru-di-ment, egwyddor, cynbrawf
Ru-in-ate, andwyo, andwyol
Ru-in-ous, adfeiliog, andwyol