7 letter words:
affixes20,
5 letter words:
affix18,
faxes15,
fixes15,
fiefs11,
fifes11,
4 letter words:
axes11,
axis11,
effs10,
fief10,
fife10,
safe7,
seif7,
3 letter words:
fax13,
fix13,
axe10,
sax10,
sex10,
six10,
xis10,
aff9,
eff9,
iff9,
efs6,
fas6,
fes6,
fie6,
ifs6,
ais3,
sae3,
sea3,
sei3,
2 letter words:
ax9,
ex9,
xi9,
ef5,
fa5,
fe5,
if5,
ae2,
ai2,
as2,
es2,
is2,
si2,