8 letter words:
fiftieth17,
5 letter words:
fifth14,
theft11,
thief11,
fitte8,
tithe8,
4 letter words:
fief10,
fife10,
fifi10,
heft10,
teff10,
tiff10,
fett7,
fitt7,
teth7,
tift7,
tite4,
titi4,
3 letter words:
eff9,
feh9,
iff9,
eft6,
eth6,
fet6,
fie6,
fit6,
het6,
hie6,
hit6,
tef6,
the6,
tet3,
tie3,
tit3,
2 letter words:
ef5,
eh5,
fe5,
he5,
hi5,
if5,
et2,
it2,
te2,
ti2,