5 letter words:
bucko13,
kimbo13,
kombu13,
combi11,
4 letter words:
bock12,
buck12,
mick12,
mock12,
muck12,
bouk10,
buik10,
comb10,
moki10,
mico8,
ombu8,
umbo8,
3 letter words:
bok9,
ick9,
kob9,
bum7,
cob7,
cub7,
cum7,
koi7,
mib7,
mic7,
mob7,
moc7,
oik7,
ouk7,
bio5,
boi5,
moi5,
mou5,
obi5,
2 letter words:
ki6,
ko6,
bi4,
bo4,
mi4,
mo4,
mu4,
ob4,
om4,
um4,
io2,
oi2,
ou2,