5 letter words:
kombu13,
krubi11,
4 letter words:
birk10,
bork10,
mirk10,
murk10,
brim8,
umbo8,
biro6,
brio6,
3 letter words:
kob9,
bum7,
irk7,
kir7,
koi7,
kor7,
mib7,
mob7,
bio5,
bro5,
bur5,
mir5,
mor5,
obi5,
orb5,
rib5,
rim5,
rob5,
rom5,
rub5,
rum5,
urb5,
our3,
2 letter words:
ki6,
bi4,
bo4,
mi4,
mo4,
mu4,
om4,
um4,
oi2,
or2,