7 letter words:
prefund13,
6 letter words:
funder10,
refund10,
pruned9,
5 letter words:
unfed9,
drupe8,
duper8,
perdu8,
prude8,
upend8,
urped8,
prune7,
nuder6,
under6,
4 letter words:
fend8,
feud8,
fund8,
dupe7,
enuf7,
fern7,
pend7,
pure6,
dune5,
dure5,
durn5,
nerd5,
nude5,
nurd5,
rend5,
rude5,
rued5,
unde5,
rune4,
3 letter words:
def7,
fed7,
fud7,
dup6,
fen6,
fer6,
feu6,
fun6,
fur6,
ped6,
pud6,
ref6,
pen5,
per5,
pun5,
pur5,
rep5,
urp5,
den4,
due4,
dun4,
end4,
red4,
urd4,
ern3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
pe4,
up4,
de3,
ed3,
en2,
er2,
ne2,
nu2,
re2,
un2,