7 letter words:
deterge9,
greeted9,
6 letter words:
defter10,
feeder10,
reefed10,
refeed10,
degree8,
5 letter words:
defer9,
feted9,
freed9,
refed9,
edger7,
greed7,
deter6,
egret6,
greet6,
treed6,
4 letter words:
deft8,
feed8,
feet7,
fere7,
fete7,
free7,
fret7,
reef7,
reft7,
tref7,
dreg6,
edge6,
geed6,
deer5,
deet5,
dere5,
dree5,
eger5,
gree5,
rede5,
reed5,
teed5,
rete4,
tree4,
3 letter words:
def7,
fed7,
eft6,
fee6,
fer6,
fet6,
ref6,
ged5,
dee4,
erg4,
gee4,
get4,
red4,
reg4,
ted4,
teg4,
ere3,
ree3,
ret3,
tee3,
2 letter words:
ef5,
fe5,
de3,
ed3,
er2,
et2,
re2,