7 letter words:
heftier13,
6 letter words:
hefter12,
heifer12,
either9,
5 letter words:
firth11,
frith11,
hefte11,
thief11,
ether8,
fiere8,
freet8,
freit8,
hiree8,
ither8,
refit8,
rifte8,
terfe8,
their8,
there8,
three8,
treif8,
retie5,
4 letter words:
heft10,
ethe7,
feer7,
feet7,
fere7,
fete7,
fier7,
fire7,
free7,
fret7,
frit7,
heir7,
here7,
hete7,
hire7,
reef7,
reft7,
reif7,
rife7,
rift7,
tehr7,
terf7,
thee7,
thir7,
tref7,
rete4,
rite4,
teer4,
tier4,
tire4,
tree4,
trie4,
3 letter words:
feh9,
eft6,
erf6,
eth6,
fee6,
fer6,
fet6,
fie6,
fir6,
fit6,
her6,
het6,
hie6,
hit6,
ref6,
reh6,
rif6,
tef6,
the6,
ere3,
ire3,
ree3,
rei3,
ret3,
rit3,
tee3,
tie3,
2 letter words:
ef5,
eh5,
fe5,
he5,
hi5,
if5,
ee2,
er2,
et2,
it2,
re2,
te2,
ti2,