6 letter words:
otitis6,
5 letter words:
bitts7,
botts7,
obits7,
titis5,
toits5,
4 letter words:
bios6,
bits6,
bitt6,
bots6,
bott6,
ibis6,
obis6,
obit6,
stob6,
stot4,
titi4,
tits4,
toit4,
tost4,
tots4,
3 letter words:
bio5,
bis5,
bit5,
bos5,
bot5,
obi5,
sib5,
sob5,
its3,
sit3,
sot3,
tis3,
tit3,
tot3,
2 letter words:
bi4,
bo4,
is2,
it2,
oi2,
os2,
si2,
so2,
ti2,
to2,