Bord-er, ffin, terfyn; godre
Bo-rough, bwrdeisdref
Bor-row, echwyna, benthyca
Bo-som, mynwes: mynwesu
Bot-tle, potel, costrel: costrelu
Bot-tom, gwaelod, sylfaen
Bound-less, annherfynol
Boun-ty, haelioni, rhadlonedd
Bow-els, ymysgar, coluddion
Brace-let, breichled