5 letter words:
abbot9,
about7,
4 letter words:
babu8,
boab8,
boba8,
buba8,
bubo8,
abut6,
boat6,
bota6,
bout6,
buat6,
tabu6,
tuba6,
auto4,
3 letter words:
abb7,
bob7,
bub7,
abo5,
bat5,
boa5,
bot5,
but5,
oba5,
tab5,
tub5,
oat3,
out3,
tao3,
tau3,
uta3,
2 letter words:
ab4,
ba4,
bo4,
ob4,
at2,
ou2,
ta2,
to2,
ut2,