5 letter words:
courb9,
buroo7,
4 letter words:
bowr9,
brow9,
crow9,
curb8,
boor6,
broo6,
cour6,
3 letter words:
bow8,
cow8,
cob7,
cub7,
row6,
woo6,
boo5,
bor5,
bro5,
bru5,
bur5,
coo5,
cor5,
cru5,
cur5,
obo5,
orb5,
orc5,
rob5,
roc5,
rub5,
ruc5,
urb5,
oor3,
our3,
roo3,
2 letter words:
ow5,
wo5,
bo4,
ob4,
oo2,
or2,
ou2,
ur2,