6 letter words:
urosis6,
5 letter words:
riffs11,
ruffs11,
fours8,
surfs8,
risus5,
sorus5,
sours5,
4 letter words:
offs10,
riff10,
ruff10,
firs7,
foss7,
four7,
fous7,
fris7,
fros7,
furs7,
fuss7,
orfs7,
rifs7,
surf7,
ufos7,
isos4,
ours4,
sirs4,
sori4,
sour4,
sous4,
sris4,
3 letter words:
iff9,
off9,
fir6,
for6,
fou6,
fro6,
fur6,
ifs6,
orf6,
rif6,
sif6,
ufo6,
ios3,
iso3,
ors3,
our3,
ous3,
sir3,
sis3,
sos3,
sou3,
sri3,
sui3,
sur3,
sus3,
2 letter words:
if5,
of5,
io2,
is2,
oi2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,