5 letter words:
babka13,
kabab13,
kabob13,
abbot9,
about7,
4 letter words:
abba8,
baba8,
babu8,
bubo8,
kata8,
taka8,
abut6,
boat6,
bota6,
bout6,
tabu6,
tuba6,
auto4,
3 letter words:
kab9,
kob9,
auk7,
bob7,
bub7,
kat7,
koa7,
oak7,
oka7,
aba5,
abo5,
baa5,
bat5,
boa5,
bot5,
but5,
oba5,
tab5,
tub5,
oat3,
out3,
tao3,
tau3,
uta3,
2 letter words:
ka6,
ab4,
ba4,
bo4,
aa2,
at2,
ta2,
to2,
ut2,