6 letter words:
krubut12,
rubout8,
5 letter words:
turbo7,
4 letter words:
bork10,
bouk10,
burk10,
koru8,
kuru8,
kutu8,
touk8,
turk8,
bort6,
bout6,
brut6,
rout4,
tour4,
3 letter words:
bok9,
kob9,
kor7,
ouk7,
rok7,
bor5,
bot5,
bro5,
bru5,
bur5,
but5,
orb5,
rob5,
rub5,
tub5,
urb5,
ort3,
our3,
out3,
rot3,
rut3,
tor3,
utu3,
2 letter words:
ko6,
bo4,
ob4,
or2,
ou2,
to2,
ur2,
ut2,