5 letter words:
bigot8,
4 letter words:
book10,
kobo10,
gook9,
koto8,
took8,
biog7,
gobo7,
boot6,
obit6,
3 letter words:
kob9,
kit7,
koi7,
big6,
bog6,
gib6,
gob6,
bio5,
bit5,
boo5,
bot5,
obi5,
git4,
goo4,
got4,
tog4,
oot3,
too3,
2 letter words:
ki6,
bi4,
bo4,
go3,
it2,
oi2,
ti2,
to2,