Build-er, adeiladydd, adeiladwr
Build-ing, adail, adeilad, adeiladaeth
Bul-let, pelen, pelen gwn
Bul-lock, bustach, eidion, ych
Bul-ly, byglwr: hyllddwrdio
Bul-wark, gwrthglawdd, rhagfur, amddiffynfa
Bun-dle, sypyn, bwrn: sypynu
Buoy-ant, nofiawl, ysgafn
Bur-den, baich: beichio
Bu-reau, ysgrifengist