5 letter words:
fossa8,
sofas8,
oasis5,
ossia5,
4 letter words:
foss7,
oafs7,
sofa7,
isos4,
ossa4,
sais4,
3 letter words:
fas6,
ifs6,
oaf6,
sif6,
ais3,
ass3,
ios3,
iso3,
sai3,
sis3,
sos3,
2 letter words:
fa5,
if5,
of5,
ai2,
as2,
io2,
is2,
oi2,
os2,
si2,
so2,