4 letter words:
boko10,
bonk10,
book10,
knob10,
kobo10,
kolo8,
look8,
nook8,
bolo6,
bool6,
boon6,
lobo6,
obol6,
loon4,
nolo4,
3 letter words:
bok9,
kob9,
kon7,
bon5,
boo5,
lob5,
nob5,
obo5,
loo3,
noo3,
ono3,
oon3,
2 letter words:
ko6,
bo4,
ob4,
lo2,
no2,
on2,
oo2,