9 letter words:
unmuffled18,
8 letter words:
unmuffle16,
7 letter words:
muffled16,
6 letter words:
muffed15,
muffle14,
duffel13,
duffle13,
luffed13,
flumed12,
5 letter words:
fumed11,
flume10,
flued9,
unfed9,
muled8,
lumen7,
undue6,
unled6,
4 letter words:
muff12,
duff11,
luff10,
fume9,
delf8,
fend8,
feud8,
fled8,
fund8,
enuf7,
flue7,
fuel7,
meld7,
mend7,
menu6,
mule6,
neum6,
duel5,
dune5,
lend5,
leud5,
lude5,
nude5,
unde5,
lune4,
3 letter words:
eff9,
fem8,
def7,
fed7,
fud7,
elf6,
fen6,
feu6,
flu6,
fun6,
med6,
mud6,
elm5,
emu5,
lum5,
mel5,
men5,
mun5,
del4,
den4,
due4,
dun4,
eld4,
end4,
led4,
leu3,
ulu3,
2 letter words:
ef5,
fe5,
em4,
me4,
mu4,
um4,
de3,
ed3,
el2,
en2,
ne2,
nu2,
un2,
