Sud-den, disyfyd, dirybudd
Su-et, gwer, brasder caled
Suf-fer, goddef, dyoddef; caniatau
Suf-fice, digoni, diwallu, boddloni
Suf-frage, pleidlais, llais
Su-gar, sugr, siwgwr: siwgro
Sug-gest, arafgrybwyll, sibrwd
Suit-or, erfyniwr; carwr
Sulk-y, anfoddog, afrywiog
Sul-len, sarug, cuchiog