5 letter words:
boink11,
4 letter words:
bink10,
boko10,
bonk10,
book10,
knob10,
kobo10,
ikon8,
kino8,
nook8,
oink8,
boon6,
3 letter words:
bok9,
kob9,
ink7,
kin7,
koi7,
kon7,
oik7,
bin5,
bio5,
boi5,
bon5,
boo5,
nib5,
nob5,
obi5,
obo5,
ion3,
noo3,
ono3,
oon3,
2 letter words:
ki6,
ko6,
bi4,
bo4,
ob4,
in2,
io2,
no2,
oi2,
on2,
oo2,