5 letter words:
bloop9,
orlop7,
4 letter words:
burp8,
blur6,
bolo6,
boor6,
broo6,
burl6,
lobo6,
loop6,
loup6,
obol6,
polo6,
pool6,
poor6,
pour6,
purl6,
roup6,
lour4,
3 letter words:
bop7,
pub7,
boo5,
bro5,
bur5,
lob5,
lop5,
orb5,
pol5,
poo5,
pro5,
pul5,
pur5,
rob5,
rub5,
upo5,
urb5,
urp5,
loo3,
our3,
2 letter words:
bo4,
op4,
up4,
lo2,
or2,