bbbbbbbb bo-bo-bo bobobobs bobrowko boobooks bookwork bourrous bow-wows bowbrook broubrou bukowsko buruburu bushboks hokohoko hooroosh horohoro horrours hosororo houssour hubbuboo hurr-bur hurroosh hushhush khushboo khuskhus kobukuro kohukohu kokborok koshkosh kouskous koussour krukowko kukukuku kukuruku kuruburu kurukuru kushbush ohboohoo oroborus rokkurro rokusho rushhour rushrush rushwork shooshoo shoshoko show-how showshow skokowko skrobow sourbush subshrub sussurus susurrus ubbubboo uh-uh-uh uroboros usoshows workbook wou-wous wow-wows