6 letter words:
suffix19,
effuse12,
5 letter words:
fixes15,
fiefs11,
fifes11,
fusee8,
4 letter words:
exes11,
effs10,
fief10,
fife10,
fees7,
feus7,
fuse7,
seif7,
3 letter words:
fix13,
sex10,
six10,
xis10,
eff9,
iff9,
efs6,
fee6,
fes6,
feu6,
fie6,
ifs6,
see3,
sei3,
sue3,
use3,
2 letter words:
ex9,
xi9,
xu9,
ef5,
fe5,
if5,
es2,
is2,
si2,
us2,