7 letter words:
automat9,
4 letter words:
atma6,
atom6,
matt6,
maut6,
moat6,
mott6,
mutt6,
auto4,
taut4,
tout4,
3 letter words:
ama5,
amu5,
mat5,
moa5,
mot5,
mut5,
tam5,
tom5,
att3,
oat3,
out3,
tao3,
tat3,
tau3,
tot3,
tut3,
uta3,
2 letter words:
am4,
ma4,
mo4,
mu4,
om4,
um4,
aa2,
at2,
ta2,
to2,
ut2,
