5 letter words:
packs13,
stack11,
tacks11,
pacts9,
4 letter words:
pack12,
cask10,
sack10,
tack10,
caps8,
kats8,
pacs8,
pact8,
skat8,
taks8,
task8,
acts6,
apts6,
cast6,
cats6,
past6,
pats6,
scat6,
spat6,
stap6,
taps6,
3 letter words:
ask7,
cap7,
kas7,
kat7,
pac7,
ska7,
tak7,
tsk7,
act5,
apt5,
asp5,
cat5,
pas5,
pat5,
pst5,
sac5,
sap5,
spa5,
tap5,
sat3,
tas3,
2 letter words:
ka6,
pa4,
as2,
at2,
st2,
ta2,