5 letter words:
ziffs20,
fuzes17,
fiefs11,
fifes11,
4 letter words:
ziff19,
fuze16,
size13,
effs10,
fief10,
fife10,
feis7,
feus7,
fuse7,
seif7,
3 letter words:
fez15,
fiz15,
sez12,
eff9,
iff9,
efs6,
fes6,
feu6,
fie6,
ifs6,
sif6,
sei3,
sue3,
sui3,
use3,
2 letter words:
ef5,
fe5,
if5,
es2,
is2,
si2,
us2,