8 letter words:
deferred13,
6 letter words:
feeder10,
reefed10,
refeed10,
reefer9,
redder8,
reeded8,
5 letter words:
defer9,
freed9,
refed9,
freer8,
frere8,
refer8,
dreed7,
reded7,
erred6,
4 letter words:
feed8,
fere7,
free7,
reef7,
deed6,
redd6,
deer5,
dere5,
dree5,
rede5,
reed5,
3 letter words:
def7,
fed7,
fee6,
fer6,
ref6,
dee4,
red4,
ere3,
err3,
ree3,
2 letter words:
ef5,
fe5,
de3,
ed3,
er2,
re2,