6 letter words:
tiffin12,
finite9,
5 letter words:
feint8,
4 letter words:
fief10,
fife10,
teff10,
tiff10,
fine7,
neif7,
inti4,
nite4,
tine4,
3 letter words:
eff9,
iff9,
eft6,
fen6,
fet6,
fie6,
fin6,
fit6,
net3,
nit3,
ten3,
tie3,
tin3,
2 letter words:
ef5,
fe5,
if5,
en2,
et2,
in2,
it2,
ne2,
ti2,