5 letter words:
boric9,
courb9,
curio7,
4 letter words:
crib8,
curb8,
biro6,
brio6,
coir6,
cour6,
uric6,
3 letter words:
cob7,
cub7,
bio5,
boi5,
bor5,
bro5,
bru5,
bur5,
cor5,
cru5,
cur5,
obi5,
orb5,
orc5,
rib5,
rob5,
roc5,
rub5,
ruc5,
urb5,
our3,
2 letter words:
bi4,
bo4,
ob4,
io2,
oi2,
or2,
ou2,
ur2,