6 letter words:
furies9,
surfie9,
5 letter words:
fiers8,
fires8,
fries8,
frise8,
reifs8,
serif8,
sieur5,
4 letter words:
feis7,
feus7,
fier7,
fire7,
firs7,
fris7,
furs7,
fuse7,
refs7,
reif7,
rife7,
rifs7,
seif7,
serf7,
surf7,
ires4,
iure4,
reis4,
rise4,
rues4,
ruse4,
seir4,
sire4,
suer4,
sure4,
ures4,
user4,
3 letter words:
efs6,
erf6,
fer6,
fes6,
feu6,
fie6,
fir6,
fur6,
ifs6,
ref6,
rif6,
sif6,
ers3,
ire3,
rei3,
res3,
rue3,
sei3,
ser3,
sir3,
sri3,
sue3,
sui3,
sur3,
ure3,
use3,
2 letter words:
ef5,
fe5,
if5,
er2,
es2,
is2,
re2,
si2,
ur2,
us2,
