Os-ten-ta-tion, rhodres, gwagymddangosiad
Os-ten-ta-tious, rhodresol; ymffrostgar
O-ver-flow-ing, gorllawndid, gorlifiad
O-ver-look-er, arolygydd
O-ver-shad-ow, argysgodi, arhuddo
O-vip-a-rous, dodŵyol, dodŵynog
Pal-a-ta-ble, chwaethus, blasus
Pal-pi-ta-tion, dychlamiad; curiad
Pa-ren-the-sis, cromfachau (); ymsang
Pa-ro-chi-al, plwyfol