8 letter words:
oppugner13,
6 letter words:
oppugn11,
popgun11,
progun9,
repugn9,
5 letter words:
preop9,
upper9,
grope8,
group8,
pengo8,
prong8,
purge8,
unpeg8,
prone7,
prune7,
erugo6,
genro6,
goner6,
rogue6,
rouge6,
rouen5,
4 letter words:
pepo8,
perp8,
pope8,
prep8,
prop8,
repp8,
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:
pep7,
pop7,
pup7,
peg6,
pug6,
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:
op4,
pe4,
up4,
go3,
en2,
er2,
ne2,
no2,
nu2,
oe2,
on2,
or2,
re2,
un2,