7 letter words:
furioso10,
5 letter words:
fours8,
roofs8,
4 letter words:
firs7,
four7,
fous7,
fris7,
fros7,
furs7,
oofs7,
orfs7,
rifs7,
roof7,
surf7,
ufos7,
ours4,
roos4,
sori4,
sour4,
3 letter words:
fir6,
for6,
fou6,
fro6,
fur6,
ifs6,
oof6,
orf6,
rif6,
sif6,
ufo6,
ios3,
iso3,
oor3,
oos3,
ors3,
our3,
ous3,
roo3,
sir3,
sou3,
sri3,
sui3,
sur3,
2 letter words:
if5,
of5,
io2,
is2,
oi2,
oo2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,
