5 letter words:
aback13,
babka13,
kabab13,
abaka11,
abaca9,
abaci9,
4 letter words:
back12,
abac8,
abba8,
baba8,
caba8,
acai6,
3 letter words:
ick9,
kab9,
abb7,
aka7,
bac7,
bib7,
cab7,
kai7,
aba5,
baa5,
caa5,
aia3,
2 letter words:
ka6,
ki6,
ab4,
ba4,
bi4,
aa2,
ai2,