6 letter words:
surfer9,
surger7,
urgers7,
5 letter words:
frugs9,
fetus8,
frets8,
turfs8,
grues6,
guest6,
surge6,
trugs6,
urger6,
urges6,
ruers5,
surer5,
truer5,
trues5,
4 letter words:
frug8,
fugs8,
efts7,
fest7,
fets7,
feus7,
fret7,
furs7,
fuse7,
refs7,
reft7,
serf7,
surf7,
tref7,
turf7,
ergs5,
gest5,
gets5,
grue5,
gust5,
guts5,
regs5,
rugs5,
tegs5,
trug5,
tugs5,
urge5,
errs4,
erst4,
rest4,
rets4,
ruer4,
rues4,
ruse4,
rust4,
ruts4,
suer4,
suet4,
sure4,
tres4,
true4,
user4,
utes4,
3 letter words:
fug7,
efs6,
eft6,
fer6,
fes6,
fet6,
feu6,
fur6,
ref6,
erg4,
get4,
gut4,
reg4,
rug4,
seg4,
teg4,
tug4,
err3,
ers3,
res3,
ret3,
rue3,
rut3,
ser3,
set3,
sue3,
use3,
ute3,
uts3,
2 letter words:
ef5,
fe5,
er2,
es2,
et2,
re2,
us2,
ut2,