6 letter words:
puffed15,
unfeed10,
5 letter words:
effed12,
feued9,
unfed9,
pendu8,
pened8,
upend8,
endue6,
undee6,
4 letter words:
puff12,
duff11,
nuff10,
feed8,
fend8,
feud8,
fund8,
deep7,
dupe7,
enuf7,
feen7,
peed7,
pend7,
neep6,
peen6,
pene6,
deen5,
dene5,
dune5,
need5,
nude5,
unde5,
3 letter words:
eff9,
def7,
fed7,
fud7,
dup6,
fee6,
fen6,
feu6,
fun6,
nef6,
ped6,
pud6,
nep5,
pee5,
pen5,
pun5,
dee4,
den4,
due4,
dun4,
end4,
ned4,
een3,
ene3,
nee3,
2 letter words:
ef5,
fe5,
pe4,
up4,
de3,
ed3,
ee2,
en2,
ne2,
nu2,
un2,