5 letter words:
force10,
forge9,
gofer9,
erugo6,
rogue6,
rouge6,
4 letter words:
corf9,
curf9,
frog8,
frug8,
fore7,
four7,
froe7,
cero6,
core6,
cure6,
ecru6,
ergo5,
goer5,
gore5,
grue5,
ogre5,
urge5,
euro4,
roue4,
3 letter words:
fog7,
fug7,
cog6,
fer6,
feu6,
foe6,
for6,
fou6,
fro6,
fur6,
ref6,
cor5,
cru5,
cue5,
cur5,
ecu5,
orc5,
rec5,
roc5,
ego4,
erg4,
gor4,
reg4,
rug4,
ore3,
our3,
roe3,
rue3,
2 letter words:
ef5,
fe5,
of5,
go3,
er2,
oe2,
or2,
re2,