9 letter words:
fungiform18,
7 letter words:
muffing16,
griffon14,
ruffing14,
forming13,
uniform12,
6 letter words:
muffin14,
goniff13,
offing13,
fuming12,
runoff12,
inform11,
gonium9,
muring9,
5 letter words:
griff12,
gruff12,
forum10,
fugio9,
fungi9,
fungo9,
gonif9,
mungo8,
minor7,
mourn7,
onium7,
giron6,
groin6,
guiro6,
ruing6,
unrig6,
4 letter words:
miff12,
muff12,
guff11,
riff10,
ruff10,
firm9,
form9,
from9,
frig8,
frog8,
frug8,
fino7,
firn7,
foin7,
four7,
gorm7,
grim7,
grum7,
info7,
morn6,
muni6,
muon6,
norm6,
girn5,
giro5,
grin5,
ring5,
rung5,
inro4,
iron4,
noir4,
nori4,
ruin4,
3 letter words:
iff9,
off9,
fig7,
fog7,
fug7,
fin6,
fir6,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
gum6,
mig6,
mog6,
mug6,
rif6,
mir5,
mon5,
mor5,
mun5,
nim5,
nom5,
rim5,
rom5,
rum5,
gin4,
gnu4,
gor4,
gun4,
nog4,
rig4,
rug4,
ion3,
nor3,
our3,
rin3,
run3,
urn3,
2 letter words:
if5,
of5,
mi4,
mo4,
mu4,
om4,
um4,
go3,
in2,
no2,
nu2,
oi2,
on2,
or2,
un2,