7 letter words:
rooping10,
6 letter words:
ooping9,
pooing9,
poring9,
proign9,
roping9,
5 letter words:
gipon8,
oping8,
pingo8,
pirog8,
pongo8,
prong8,
orpin7,
poori7,
porno7,
prion7,
proin7,
giron6,
groin6,
4 letter words:
goop7,
gorp7,
grip7,
ping7,
pogo7,
pong7,
prig7,
prog7,
noop6,
pion6,
pirn6,
poon6,
poor6,
porn6,
proo6,
roop6,
girn5,
giro5,
goon5,
goor5,
gori5,
grin5,
ingo5,
ring5,
rong5,
inro4,
iron4,
noir4,
nori4,
roin4,
roon4,
3 letter words:
gip6,
pig6,
nip5,
oop5,
pin5,
pir5,
poi5,
poo5,
pro5,
rip5,
gin4,
gio4,
gon4,
goo4,
gor4,
nog4,
rig4,
ion3,
noo3,
nor3,
ono3,
oon3,
oor3,
rin3,
roo3,
2 letter words:
op4,
pi4,
po4,
gi3,
go3,
in2,
io2,
no2,
oi2,
on2,
oo2,
or2,