7 letter words:
firrier10,
5 letter words:
firer8,
frier8,
frore8,
hirer8,
rifer8,
error5,
4 letter words:
fire7,
fore7,
froe7,
heir7,
hero7,
hire7,
hoer7,
reif7,
rife7,
3 letter words:
feh9,
foh9,
fer6,
fie6,
fir6,
foe6,
for6,
fro6,
her6,
hie6,
hoe6,
ref6,
rho6,
rif6,
err3,
ire3,
ore3,
rei3,
roe3,
2 letter words:
ef5,
eh5,
fe5,
he5,
hi5,
ho5,
if5,
of5,
oh5,
er2,
oe2,
oi2,
or2,
re2,