6 letter words:
superb10,
5 letter words:
burps9,
pubes9,
burse7,
puers7,
pures7,
purse7,
rebus7,
rubes7,
sprue7,
spuer7,
suber7,
super7,
4 letter words:
burp8,
pube8,
pubs8,
brus6,
burs6,
puer6,
pure6,
purs6,
rebs6,
reps6,
rube6,
rubs6,
spue6,
spur6,
supe6,
urbs6,
urps6,
rues4,
ruse4,
suer4,
sure4,
ures4,
user4,
3 letter words:
pub7,
bes5,
bru5,
bur5,
bus5,
per5,
pes5,
pre5,
pur5,
pus5,
reb5,
rep5,
rub5,
sub5,
sup5,
ups5,
urb5,
urp5,
ers3,
res3,
rue3,
ser3,
sue3,
sur3,
ure3,
use3,
2 letter words:
be4,
pe4,
up4,
er2,
es2,
re2,
ur2,
us2,