7 letter words:
orderer8,
reorder8,
5 letter words:
defer9,
freed9,
refed9,
freer8,
frere8,
frore8,
refer8,
erode6,
erred6,
order6,
error5,
4 letter words:
feed8,
feod8,
ford8,
fere7,
fore7,
free7,
froe7,
reef7,
deer5,
dere5,
doer5,
dore5,
dorr5,
dree5,
rede5,
redo5,
reed5,
rode5,
3 letter words:
def7,
fed7,
fee6,
fer6,
foe6,
for6,
fro6,
ref6,
dee4,
doe4,
dor4,
ode4,
red4,
rod4,
ere3,
err3,
ore3,
ree3,
roe3,
2 letter words:
ef5,
fe5,
of5,
de3,
do3,
ed3,
od3,
er2,
oe2,
or2,
re2,