10 letter words:
efficience20,
5 letter words:
fence10,
ficin10,
niece7,
4 letter words:
fief10,
fife10,
fifi10,
niff10,
fice9,
ecce8,
feen7,
feni7,
fine7,
fini7,
neif7,
nief7,
nife7,
cine6,
nice6,
eine4,
3 letter words:
eff9,
iff9,
fee6,
fen6,
fie6,
fin6,
nef6,
cee5,
ice5,
een3,
ene3,
nee3,
nie3,
2 letter words:
ef5,
fe5,
if5,
ee2,
en2,
in2,
ne2,