7 letter words:
fedexes18,
6 letter words:
feesed10,
5 letter words:
fedex16,
desex13,
dexes13,
sexed13,
feeds9,
feese8,
4 letter words:
exed12,
exes11,
feds8,
feed8,
fees7,
dees5,
seed5,
3 letter words:
dex11,
sex10,
def7,
fed7,
efs6,
fee6,
fes6,
dee4,
eds4,
sed4,
see3,
2 letter words:
ex9,
ef5,
fe5,
de3,
ed3,
ee2,
es2,
