5 letter words:
backs13,
stack11,
tacks11,
4 letter words:
back12,
bask10,
cask10,
kabs10,
sack10,
tack10,
bacs8,
cabs8,
kats8,
scab8,
skat8,
taks8,
task8,
acts6,
bast6,
bats6,
cast6,
cats6,
scat6,
stab6,
tabs6,
3 letter words:
kab9,
ask7,
bac7,
cab7,
kas7,
kat7,
ska7,
tak7,
tsk7,
abs5,
act5,
bas5,
bat5,
cat5,
sab5,
sac5,
tab5,
sat3,
tas3,
2 letter words:
ka6,
ab4,
ba4,
as2,
at2,
st2,
ta2,