6 letter words:
stooks10,
boosts8,
5 letter words:
books11,
bosks11,
kobos11,
kotos9,
sooks9,
stook9,
boost7,
boots7,
stobs7,
soots5,
4 letter words:
book10,
bosk10,
kobo10,
kobs10,
koss8,
koto8,
sook8,
took8,
tsks8,
boos6,
boot6,
boss6,
bots6,
sobs6,
stob6,
oots4,
soot4,
sots4,
toss4,
3 letter words:
kob9,
kos7,
tsk7,
boo5,
bos5,
bot5,
sob5,
oot3,
sos3,
sot3,
too3,
2 letter words:
bo4,
os2,
so2,
to2,