6 letter words:
feases9,
easies6,
5 letter words:
fiefs11,
fifes11,
fease8,
fesse8,
safes8,
seifs8,
eases5,
seise5,
4 letter words:
effs10,
fief10,
fife10,
fees7,
fess7,
safe7,
seif7,
ease4,
eses4,
seas4,
sees4,
seis4,
3 letter words:
aff9,
eff9,
iff9,
efs6,
fas6,
fee6,
fes6,
fie6,
ifs6,
ais3,
ass3,
ess3,
sae3,
sea3,
see3,
sei3,
sis3,
2 letter words:
ef5,
fa5,
fe5,
if5,
ae2,
ai2,
as2,
es2,
is2,
si2,