6 letter words:
funder10,
refund10,
5 letter words:
unfed9,
nuder6,
under6,
4 letter words:
fend8,
feud8,
fund8,
enuf7,
fern7,
dune5,
dure5,
durn5,
nerd5,
nude5,
nurd5,
rend5,
rude5,
rued5,
unde5,
rune4,
3 letter words:
def7,
fed7,
fud7,
fen6,
fer6,
feu6,
fun6,
fur6,
ref6,
den4,
due4,
dun4,
end4,
red4,
urd4,
ern3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
de3,
ed3,
en2,
er2,
ne2,
nu2,
re2,
un2,