5 letter words:
mourn7,
4 letter words:
mumu8,
morn6,
muon6,
norm6,
roum6,
ourn4,
3 letter words:
mom7,
mum7,
umm7,
mon5,
mor5,
mou5,
mun5,
nom5,
rom5,
rum5,
umu5,
nor3,
nur3,
our3,
run3,
urn3,
2 letter words:
mm6,
mo4,
mu4,
om4,
um4,
no2,
nu2,
on2,
or2,
ou2,
un2,
ur2,