5 letter words:
frons8,
roofs8,
roons5,
4 letter words:
offs10,
fons7,
fros7,
oofs7,
orfs7,
roof7,
onos4,
oons4,
roon4,
roos4,
soon4,
sorn4,
3 letter words:
off9,
fon6,
for6,
fro6,
oof6,
orf6,
noo3,
nor3,
nos3,
ono3,
ons3,
oon3,
oor3,
oos3,
ors3,
roo3,
son3,
2 letter words:
of5,
no2,
on2,
oo2,
or2,
os2,
so2,