6 letter words:
bookie12,
cookie12,
5 letter words:
ebook11,
4 letter words:
beck12,
bock12,
bike10,
boke10,
boko10,
book10,
coke10,
cook10,
kibe10,
kobo10,
bice8,
oboe6,
3 letter words:
bok9,
ick9,
keb9,
kob9,
cob7,
eik7,
koi7,
oik7,
oke7,
bio5,
boi5,
boo5,
coo5,
eco5,
ice5,
obe5,
obi5,
obo5,
2 letter words:
ki6,
ko6,
be4,
bi4,
bo4,
ob4,
io2,
oe2,
oi2,
oo2,