5 letter words:
oobit7,
4 letter words:
boko10,
book10,
kobo10,
koto8,
toko8,
took8,
bito6,
boot6,
obit6,
3 letter words:
bok9,
kob9,
kit7,
koi7,
oik7,
bio5,
bit5,
boi5,
boo5,
bot5,
obi5,
obo5,
oot3,
too3,
2 letter words:
ki6,
ko6,
bi4,
bo4,
ob4,
io2,
it2,
oi2,
oo2,
ti2,
to2,