7 letter words:
progger11,
6 letter words:
groper9,
gorger8,
5 letter words:
grope8,
gorge7,
grego7,
repro7,
roper7,
roger6,
4 letter words:
gorp7,
prog7,
grog6,
pore6,
repo6,
rope6,
ergo5,
goer5,
gore5,
ogre5,
3 letter words:
peg6,
egg5,
ope5,
per5,
pro5,
rep5,
ego4,
erg4,
gor4,
reg4,
err3,
ore3,
roe3,
2 letter words:
op4,
pe4,
go3,
er2,
oe2,
or2,
re2,