5 letter words:
borks11,
bouks11,
brusk11,
burks11,
korus9,
4 letter words:
boks10,
bork10,
bosk10,
bouk10,
burk10,
busk10,
kobs10,
kors8,
koru8,
ouks8,
roks8,
rusk8,
souk8,
bors6,
bros6,
brus6,
burs6,
orbs6,
robs6,
rubs6,
sorb6,
urbs6,
ours4,
sour4,
3 letter words:
bok9,
kob9,
kor7,
kos7,
ouk7,
rok7,
suk7,
bor5,
bos5,
bro5,
bru5,
bur5,
bus5,
obs5,
orb5,
rob5,
rub5,
sob5,
sub5,
urb5,
ors3,
our3,
ous3,
sou3,
sur3,
2 letter words:
ko6,
bo4,
ob4,
or2,
os2,
ou2,
so2,
ur2,
us2,