6 letter words:
oboist8,
5 letter words:
books11,
kobos11,
kotos9,
stook9,
boost7,
boots7,
obits7,
4 letter words:
bisk10,
book10,
bosk10,
kobo10,
kobs10,
kist8,
kits8,
kois8,
koto8,
skit8,
sook8,
took8,
bios6,
bits6,
boos6,
boot6,
bots6,
obis6,
obit6,
stob6,
oots4,
soot4,
3 letter words:
kob9,
kis7,
kit7,
koi7,
kos7,
ski7,
tsk7,
bio5,
bis5,
bit5,
boo5,
bos5,
bot5,
obi5,
sib5,
sob5,
its3,
oot3,
sit3,
sot3,
tis3,
too3,
2 letter words:
ki6,
bi4,
bo4,
is2,
it2,
oi2,
os2,
si2,
so2,
ti2,
to2,