5 letter words:
aback13,
babka13,
kabab13,
kebab13,
4 letter words:
back12,
beck12,
bake10,
beak10,
cake10,
abac8,
abba8,
abbe8,
baba8,
babe8,
caba8,
3 letter words:
kab9,
keb9,
abb7,
aka7,
ake7,
bac7,
cab7,
ebb7,
kae7,
kea7,
aba5,
ace5,
baa5,
caa5,
2 letter words:
ka6,
ab4,
ba4,
be4,
aa2,
ae2,
ea2,