6 letter words:
fasces11,
5 letter words:
cafes10,
faces10,
safes8,
cases7,
4 letter words:
cafe9,
face9,
fess7,
safe7,
aces6,
case6,
cess6,
sacs6,
secs6,
seas4,
3 letter words:
efs6,
fas6,
fes6,
ace5,
sac5,
sec5,
ass3,
ess3,
sae3,
sea3,
2 letter words:
ef5,
fa5,
fe5,
ae2,
as2,
es2,
