7 letter words:
porrigo10,
5 letter words:
pirog8,
poori7,
prior7,
rigor6,
4 letter words:
goop7,
gorp7,
grip7,
pogo7,
prig7,
prog7,
poor6,
proo6,
roop6,
giro5,
girr5,
goor5,
gori5,
3 letter words:
gip6,
pig6,
oop5,
pir5,
poi5,
poo5,
pro5,
rip5,
gio4,
goo4,
gor4,
rig4,
oor3,
roo3,
2 letter words:
op4,
pi4,
po4,
gi3,
go3,
io2,
oi2,
oo2,
or2,