7 letter words:
furious10,
6 letter words:
flours9,
fluors9,
rufous9,
sulfur9,
5 letter words:
filos8,
flirs8,
flour8,
fluor8,
foils8,
fouls8,
fours8,
furls8,
fusil8,
rolfs8,
sulfo8,
loris5,
louis5,
lours5,
roils5,
4 letter words:
filo7,
fils7,
firs7,
flir7,
flus7,
foil7,
foul7,
four7,
furl7,
furs7,
rifs7,
rolf7,
surf7,
lour4,
oils4,
ours4,
roil4,
silo4,
slur4,
soil4,
soli4,
sori4,
soul4,
sour4,
sulu4,
ulus4,
urus4,
3 letter words:
fil6,
fir6,
flu6,
for6,
fou6,
fro6,
fur6,
ifs6,
rif6,
lis3,
oil3,
ors3,
our3,
sir3,
sol3,
sou3,
sri3,
ulu3,
2 letter words:
if5,
of5,
is2,
li2,
lo2,
oi2,
or2,
os2,
si2,
so2,
us2,