5 letter words:
bocks13,
stock11,
tocks11,
4 letter words:
bock12,
boks10,
bosk10,
kobs10,
sock10,
tock10,
cobs8,
bots6,
cost6,
cots6,
scot6,
stob6,
tocs6,
3 letter words:
bok9,
kob9,
cob7,
kos7,
tsk7,
bos5,
bot5,
cos5,
cot5,
obs5,
sob5,
soc5,
toc5,
sot3,
2 letter words:
ko6,
bo4,
ob4,
os2,
so2,
st2,
to2,