6 letter words:
krubis12,
oribis8,
5 letter words:
birks11,
borks11,
bouks11,
briks11,
brisk11,
brusk11,
buiks11,
burks11,
krubi11,
korus9,
kuris9,
biros7,
brios7,
oribi7,
4 letter words:
birk10,
bisk10,
boks10,
bork10,
bosk10,
bouk10,
brik10,
buik10,
burk10,
busk10,
kobs10,
irks8,
kirs8,
kois8,
kors8,
koru8,
kris8,
kuri8,
oiks8,
ouks8,
risk8,
roks8,
rusk8,
skio8,
souk8,
bios6,
biro6,
bois6,
bors6,
brio6,
bris6,
bros6,
brus6,
burs6,
ibis6,
obis6,
orbs6,
ribs6,
robs6,
rubs6,
sorb6,
urbs6,
iris4,
ours4,
siri4,
sori4,
sour4,
3 letter words:
bok9,
kob9,
irk7,
kir7,
kis7,
koi7,
kor7,
kos7,
oik7,
ouk7,
rok7,
sik7,
ski7,
suk7,
bio5,
bis5,
boi5,
bor5,
bos5,
bro5,
bru5,
bur5,
bus5,
obi5,
obs5,
orb5,
rib5,
rob5,
rub5,
sib5,
sob5,
sub5,
urb5,
ios3,
iso3,
ors3,
our3,
ous3,
sir3,
sou3,
sri3,
sui3,
sur3,
2 letter words:
ki6,
ko6,
bi4,
bo4,
ob4,
io2,
is2,
oi2,
or2,
os2,
ou2,
si2,
so2,
ur2,
us2,