6 letter words:
kerfed14,
5 letter words:
reked10,
defer9,
freed9,
refed9,
4 letter words:
keef11,
kerf11,
deek9,
deke9,
drek9,
eked9,
feed8,
reek8,
reke8,
feer7,
fere7,
free7,
reef7,
deer5,
dere5,
dree5,
ered5,
rede5,
reed5,
3 letter words:
kef10,
ked8,
def7,
eek7,
eke7,
erk7,
fed7,
erf6,
fee6,
fer6,
ref6,
dee4,
red4,
ere3,
ree3,
2 letter words:
ef5,
fe5,
de3,
ed3,
ee2,
er2,
re2,