6 letter words:
surger7,
urgers7,
5 letter words:
grues6,
surge6,
urger6,
urges6,
ruers5,
surer5,
4 letter words:
ergs5,
grue5,
regs5,
rugs5,
urge5,
errs4,
ruer4,
rues4,
ruse4,
suer4,
sure4,
user4,
3 letter words:
erg4,
reg4,
rug4,
seg4,
err3,
ers3,
res3,
rue3,
ser3,
sue3,
use3,
2 letter words:
er2,
es2,
re2,
us2,