7 letter words:
enfixed18,
6 letter words:
define10,
5 letter words:
fedex16,
fixed16,
enfix15,
dexie13,
index13,
nixed13,
exine12,
fiend9,
fined9,
diene6,
4 letter words:
exed12,
nixe11,
defi8,
deif8,
feed8,
fend8,
find8,
feen7,
feni7,
fine7,
neif7,
nief7,
nife7,
deen5,
dene5,
deni5,
dine5,
eide5,
idee5,
need5,
nide5,
nied5,
eine4,
3 letter words:
fix13,
dex11,
nix10,
def7,
dif7,
fed7,
fid7,
fee6,
fen6,
fie6,
fin6,
nef6,
dee4,
dei4,
den4,
die4,
din4,
end4,
ide4,
ned4,
nid4,
een3,
ene3,
nee3,
nie3,
2 letter words:
ex9,
xi9,
ef5,
fe5,
if5,
de3,
di3,
ed3,
id3,
ee2,
en2,
in2,
ne2,