5 letter words:
strum7,
turms7,
4 letter words:
must6,
muts6,
rums6,
smur6,
smut6,
stum6,
tums6,
turm6,
rust4,
ruts4,
urus4,
utus4,
3 letter words:
mus5,
mut5,
rum5,
sum5,
tum5,
umu5,
rut3,
sur3,
uts3,
utu3,
2 letter words:
mu4,
um4,
st2,
ur2,
us2,
ut2,