6 letter words:
gnomon9,
5 letter words:
mongo8,
mungo8,
4 letter words:
mono6,
moon6,
muon6,
goon5,
noon4,
noun4,
3 letter words:
gum6,
mog6,
mug6,
mon5,
moo5,
mun5,
nom5,
gnu4,
goo4,
gun4,
nog4,
noo3,
nun3,
ono3,
2 letter words:
mo4,
mu4,
om4,
um4,
go3,
no2,
nu2,
on2,
un2,