6 letter words:
duffel13,
duffle13,
luffed13,
5 letter words:
flued9,
unfed9,
unled6,
4 letter words:
duff11,
luff10,
nuff10,
delf8,
fend8,
feud8,
fled8,
fund8,
enuf7,
flue7,
fuel7,
duel5,
dule5,
dune5,
lend5,
leud5,
lude5,
nude5,
unde5,
lune4,
3 letter words:
eff9,
def7,
fed7,
fud7,
elf6,
fen6,
feu6,
flu6,
fun6,
nef6,
del4,
den4,
due4,
dun4,
eld4,
end4,
led4,
lud4,
ned4,
leu3,
ule3,
2 letter words:
ef5,
fe5,
de3,
ed3,
el2,
en2,
ne2,
nu2,
un2,