5 letter words:
kirby14,
krubi11,
burry10,
4 letter words:
yirk11,
birk10,
brik10,
buik10,
burk10,
bury9,
ruby9,
kuri8,
yirr7,
birr6,
burr6,
3 letter words:
kyu10,
yuk10,
buy8,
irk7,
kir7,
brr5,
bru5,
bur5,
rib5,
rub5,
urb5,
2 letter words:
ky9,
by7,
ki6,
yu5,
bi4,
ur2,