5 letter words:
burse7,
rebus7,
rubes7,
suber7,
4 letter words:
burs6,
rebs6,
rube6,
rubs6,
urbs6,
rues4,
ruse4,
suer4,
sure4,
user4,
3 letter words:
bes5,
bur5,
bus5,
reb5,
rub5,
sub5,
urb5,
ers3,
res3,
rue3,
ser3,
sue3,
use3,
2 letter words:
be4,
er2,
es2,
re2,
us2,