6 letter words:
buzuki21,
5 letter words:
bitou7,
oubit7,
4 letter words:
kuzu17,
zouk17,
zobu15,
bouk10,
buik10,
kuti8,
kutu8,
touk8,
bito6,
bout6,
obit6,
3 letter words:
biz14,
zit12,
bok9,
kob9,
kit7,
koi7,
oik7,
ouk7,
bio5,
bit5,
boi5,
bot5,
but5,
obi5,
tub5,
out3,
tui3,
utu3,
2 letter words:
zo11,
ki6,
ko6,
bi4,
bo4,
ob4,
io2,
it2,
oi2,
ou2,
ti2,
to2,
ut2,