6 letter words:
fusses9,
issues6,
5 letter words:
fiefs11,
fifes11,
fuses8,
seifs8,
issue5,
sises5,
suses5,
4 letter words:
effs10,
fief10,
fife10,
feis7,
fess7,
feus7,
fuse7,
fuss7,
seif7,
seis4,
sess4,
sies4,
siss4,
sues4,
suss4,
uses4,
3 letter words:
eff9,
iff9,
efs6,
fes6,
feu6,
fie6,
ifs6,
sif6,
ess3,
sei3,
sis3,
sue3,
sui3,
sus3,
use3,
2 letter words:
ef5,
fe5,
if5,
es2,
is2,
si2,
us2,