10 letter words:
fescennine15,
7 letter words:
fennecs12,
incense9,
6 letter words:
fences11,
fennec11,
nieces8,
5 letter words:
feces10,
fence10,
fices10,
fines8,
neifs8,
cense7,
cines7,
niece7,
scene7,
since7,
nenes5,
nines5,
seine5,
4 letter words:
fice9,
fisc9,
fees7,
fens7,
fine7,
fins7,
neif7,
seif7,
cees6,
cine6,
ices6,
nice6,
sice6,
esne4,
inns4,
nene4,
nine4,
seen4,
sene4,
sine4,
3 letter words:
efs6,
fee6,
fen6,
fes6,
fie6,
fin6,
ifs6,
cee5,
cis5,
ice5,
sec5,
sic5,
ens3,
inn3,
ins3,
nee3,
see3,
sei3,
sen3,
sin3,
2 letter words:
ef5,
fe5,
if5,
en2,
es2,
in2,
is2,
ne2,
si2,