6 letter words:
bunion8,
5 letter words:
nubia7,
unban7,
anion5,
inion5,
union5,
4 letter words:
bani6,
buna6,
bunn6,
obia6,
anon4,
inia4,
naoi4,
nona4,
noun4,
unai4,
3 letter words:
abo5,
ban5,
bin5,
bio5,
boa5,
bun5,
nab5,
nib5,
nob5,
nub5,
oba5,
obi5,
ain3,
ani3,
inn3,
ion3,
nan3,
nun3,
2 letter words:
ab4,
ba4,
bi4,
bo4,
ai2,
an2,
in2,
na2,
no2,
nu2,
oi2,
on2,
un2,