5 letter words:
tombs9,
umbos9,
bouts7,
4 letter words:
bums8,
mobs8,
tomb8,
umbo8,
bots6,
bout6,
bust6,
buts6,
most6,
mots6,
must6,
muts6,
smut6,
stob6,
stub6,
stum6,
sumo6,
toms6,
tubs6,
oust4,
outs4,
3 letter words:
bum7,
mob7,
bos5,
bot5,
bus5,
but5,
mos5,
mot5,
mus5,
mut5,
oms5,
sob5,
som5,
sub5,
sum5,
tom5,
tub5,
out3,
sot3,
sou3,
uts3,
2 letter words:
bo4,
mo4,
mu4,
om4,
um4,
os2,
so2,
to2,
us2,
ut2,