6 letter words:
progun9,
repugn9,
5 letter words:
forge9,
fungo9,
gofer9,
gonef9,
grope8,
group8,
pengo8,
prong8,
purge8,
unpeg8,
prone7,
prune7,
erugo6,
genro6,
goner6,
rogue6,
rouge6,
rouen5,
4 letter words:
pouf9,
prof9,
frog8,
frug8,
enuf7,
fern7,
fore7,
four7,
froe7,
gorp7,
pong7,
prog7,
pung7,
nope6,
open6,
peon6,
pone6,
pore6,
porn6,
pour6,
pure6,
repo6,
rope6,
roup6,
upon6,
ergo5,
genu5,
goer5,
gone5,
gore5,
grue5,
ogre5,
rung5,
urge5,
euro4,
roue4,
rune4,
3 letter words:
fop8,
fog7,
fug7,
fen6,
fer6,
feu6,
foe6,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
peg6,
pug6,
ref6,
ope5,
pen5,
per5,
pro5,
pun5,
pur5,
rep5,
upo5,
urp5,
ego4,
eng4,
erg4,
gen4,
gnu4,
gor4,
gun4,
neg4,
nog4,
reg4,
rug4,
eon3,
ern3,
nor3,
one3,
ore3,
our3,
roe3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
of5,
op4,
pe4,
up4,
go3,
en2,
er2,
ne2,
no2,
nu2,
oe2,
on2,
or2,
re2,
un2,