8 letter words:
refereed12,
7 letter words:
referee10,
6 letter words:
feeder10,
feered10,
reefed10,
refeed10,
reefer9,
reeder7,
5 letter words:
defer9,
freed9,
refed9,
ferer8,
freer8,
frere8,
refer8,
deere6,
drere6,
erred6,
reede6,
4 letter words:
feed8,
feer7,
fere7,
free7,
reef7,
deer5,
dere5,
dree5,
ered5,
rede5,
reed5,
3 letter words:
def7,
fed7,
erf6,
fee6,
fer6,
ref6,
dee4,
red4,
ere3,
err3,
ree3,
2 letter words:
ef5,
fe5,
de3,
ed3,
ee2,
er2,
re2,