5 letter words:
nabob9,
4 letter words:
boab8,
boba8,
bani6,
bona6,
obia6,
naoi4,
3 letter words:
abb7,
bib7,
bob7,
abo5,
ban5,
bin5,
bio5,
boa5,
boi5,
bon5,
nab5,
nib5,
nob5,
oba5,
obi5,
ain3,
ani3,
ion3,
2 letter words:
ab4,
ba4,
bi4,
bo4,
ob4,
ai2,
an2,
in2,
io2,
na2,
no2,
oi2,
on2,