6 letter words:
conned9,
encode9,
donnee7,
neoned7,
5 letter words:
coden8,
coned8,
nonce7,
donee6,
donne6,
4 letter words:
cede7,
code7,
coed7,
deco7,
cone6,
conn6,
once6,
dene5,
done5,
need5,
node5,
nene4,
neon4,
none4,
3 letter words:
cod6,
doc6,
cee5,
con5,
dee4,
den4,
doe4,
don4,
end4,
nod4,
ode4,
eon3,
nee3,
one3,
2 letter words:
de3,
do3,
ed3,
od3,
en2,
ne2,
no2,
oe2,
on2,