4 letter words:
zebu15,
azan13,
abba8,
abbe8,
baba8,
babe8,
babu8,
bubu8,
bane6,
bean6,
beau6,
buna6,
nabe6,
unbe6,
unau4,
3 letter words:
bub7,
ebb7,
aba5,
baa5,
ban5,
ben5,
bun5,
nab5,
neb5,
nub5,
ana3,
ane3,
eau3,
nae3,
2 letter words:
za11,
ab4,
ba4,
be4,
aa2,
ae2,
an2,
en2,
na2,
ne2,
nu2,
un2,