Suf-fi-cient, digon, digonol
Suf-fo-cate, mygu, tagu
Sug-ges-tion, crybwylliad, amnaid
Suit-a-ble, cyfaddas, cydweddol, addas
Sul-phur-ous, brwmstanaidd
Sum-ma-ry, crynodeb; byr, cryno
Sump-tu-ous, mawrwych; costfawr
Su-per-fice, wyneb, arwyneb
Su-per-fine, meinwych; goreu
Su-per-sede, diswyddo: troi heibio