5 letter words:
buroo7,
4 letter words:
burp8,
prob8,
boor6,
broo6,
poor6,
pour6,
proo6,
roop6,
roup6,
3 letter words:
bop7,
pub7,
boo5,
bor5,
bro5,
bru5,
bur5,
obo5,
oop5,
orb5,
oup5,
poo5,
pro5,
pur5,
rob5,
rub5,
upo5,
urb5,
urp5,
oor3,
our3,
roo3,
2 letter words:
bo4,
ob4,
op4,
po4,
up4,
oo2,
or2,
ou2,
ur2,