6 letter words:
epigon9,
ooping9,
pigeon9,
pooing9,
goonie7,
noogie7,
5 letter words:
genip8,
gipon8,
oping8,
pengo8,
pingo8,
pongo8,
opine7,
4 letter words:
goop7,
ping7,
pogo7,
pong7,
noop6,
nope6,
open6,
pein6,
peni6,
peon6,
pine6,
pion6,
pone6,
poon6,
gien5,
gone5,
goon5,
ingo5,
onie4,
3 letter words:
gip6,
peg6,
pig6,
nep5,
nip5,
oop5,
ope5,
pen5,
pie5,
pin5,
poi5,
poo5,
ego4,
eng4,
gen4,
geo4,
gie4,
gin4,
gio4,
goe4,
gon4,
goo4,
neg4,
nog4,
eon3,
ion3,
nie3,
noo3,
one3,
ono3,
oon3,
2 letter words:
op4,
pe4,
pi4,
po4,
gi3,
go3,
en2,
in2,
io2,
ne2,
no2,
oe2,
oi2,
on2,
oo2,