5 letter words:
bucko13,
kombu13,
combo11,
coomb11,
4 letter words:
cowk13,
wock13,
bock12,
buck12,
mock12,
muck12,
womb11,
boko10,
book10,
bouk10,
comb10,
cook10,
kobo10,
moko10,
mook10,
boom8,
coom8,
ombu8,
umbo8,
3 letter words:
cwm10,
kow10,
wok10,
bok9,
kob9,
bow8,
cow8,
mow8,
bum7,
cob7,
cub7,
cum7,
mob7,
moc7,
ouk7,
woo6,
boo5,
coo5,
moo5,
mou5,
obo5,
oom5,
2 letter words:
ko6,
ow5,
wo5,
bo4,
mo4,
mu4,
ob4,
om4,
um4,
oo2,
ou2,