9 letter words:
porrenger12,
6 letter words:
groper9,
pongee9,
opener8,
pereon8,
perone8,
perron8,
proner8,
reopen8,
repone8,
engore7,
5 letter words:
grope8,
pengo8,
porge8,
prong8,
repeg8,
neper7,
porer7,
preen7,
prone7,
prore7,
repro7,
roper7,
ergon6,
genre6,
genro6,
gerne6,
goner6,
green6,
grone6,
negro6,
roger6,
error5,
4 letter words:
geep7,
gorp7,
pong7,
prog7,
neep6,
nope6,
open6,
peen6,
peer6,
pene6,
peon6,
pere6,
pern6,
pone6,
pore6,
porn6,
pree6,
repo6,
rope6,
eger5,
ergo5,
gene5,
gere5,
goer5,
gone5,
gore5,
gree5,
gren5,
ogee5,
ogre5,
rego5,
rong5,
erne4,
oner4,
reen4,
rone4,
rore4,
3 letter words:
peg6,
nep5,
ope5,
pee5,
pen5,
per5,
pre5,
pro5,
rep5,
ego4,
eng4,
erg4,
gee4,
gen4,
geo4,
goe4,
gon4,
gor4,
neg4,
nog4,
reg4,
een3,
ene3,
eon3,
ere3,
ern3,
err3,
nee3,
nor3,
one3,
ore3,
ree3,
ren3,
reo3,
roe3,
2 letter words:
op4,
pe4,
po4,
go3,
ee2,
en2,
er2,
ne2,
no2,
oe2,
on2,
or2,
re2,