7 letter words:
offeree13,
6 letter words:
forfex19,
exogen14,
goffer13,
effere12,
enfree9,
engore7,
renege7,
5 letter words:
forex15,
offer11,
reffo11,
forge9,
gofer9,
gonef9,
freon8,
ergon6,
genre6,
genro6,
gerne6,
goner6,
green6,
grone6,
negro6,
4 letter words:
grex12,
exon11,
goff11,
oxen11,
oxer11,
frog8,
feen7,
feer7,
fere7,
fern7,
foen7,
fone7,
fore7,
free7,
froe7,
orfe7,
reef7,
eger5,
ergo5,
gene5,
gere5,
goer5,
gone5,
gore5,
gree5,
gren5,
ogee5,
ogre5,
rego5,
rong5,
erne4,
oner4,
reen4,
rone4,
3 letter words:
fox13,
gox11,
exo10,
nox10,
rex10,
eff9,
off9,
feg7,
fog7,
erf6,
fee6,
fen6,
fer6,
foe6,
fon6,
for6,
fro6,
nef6,
orf6,
ref6,
ego4,
eng4,
erg4,
gee4,
gen4,
geo4,
goe4,
gon4,
gor4,
neg4,
nog4,
reg4,
een3,
ene3,
eon3,
ere3,
ern3,
nee3,
nor3,
one3,
ore3,
ree3,
ren3,
reo3,
roe3,
2 letter words:
ex9,
ox9,
ef5,
fe5,
of5,
go3,
ee2,
en2,
er2,
ne2,
no2,
oe2,
on2,
or2,
re2,