5 letter words:
genre6,
green6,
4 letter words:
fere7,
fern7,
free7,
reef7,
eger5,
gene5,
gree5,
erne4,
nene4,
3 letter words:
fee6,
fen6,
fer6,
ref6,
eng4,
erg4,
gee4,
gen4,
neg4,
reg4,
ere3,
ern3,
nee3,
ree3,
2 letter words:
ef5,
fe5,
en2,
er2,
ne2,
re2,