7 letter words:
lockbox22,
5 letter words:
block13,
4 letter words:
bock12,
boko10,
book10,
cook10,
kobo10,
lock10,
bloc8,
kolo8,
look8,
bolo6,
bool6,
cool6,
lobo6,
loco6,
obol6,
3 letter words:
box12,
cox12,
lox10,
oxo10,
bok9,
kob9,
cob7,
boo5,
col5,
coo5,
lob5,
obo5,
loo3,
2 letter words:
ox9,
ko6,
bo4,
ob4,
lo2,
oo2,
