5 letter words:
forum10,
fungo9,
mungo8,
mourn7,
4 letter words:
form9,
from9,
frog8,
frug8,
fugu8,
mumu8,
four7,
gorm7,
grum7,
morn6,
muon6,
norm6,
guru5,
rung5,
3 letter words:
fog7,
fug7,
mom7,
mum7,
umm7,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
gum6,
mog6,
mug6,
mon5,
mor5,
mun5,
nom5,
rom5,
rum5,
gnu4,
gor4,
gun4,
nog4,
rug4,
nor3,
our3,
run3,
urn3,
2 letter words:
mm6,
of5,
mo4,
mu4,
om4,
um4,
go3,
no2,
nu2,
on2,
or2,
un2,