9 letter words:
inpouring12,
7 letter words:
ingroup10,
opining10,
pouring10,
pruning10,
rouping10,
grunion8,
inuring8,
ironing8,
ruining8,
6 letter words:
pining9,
pirogi9,
poring9,
progun9,
riping9,
roping9,
urping9,
inpour8,
pinion8,
origin7,
5 letter words:
gipon8,
group8,
oping8,
piing8,
pingo8,
pirog8,
prong8,
orpin7,
pinon7,
prion7,
purin7,
unpin7,
unrip7,
giron6,
groin6,
guiro6,
iring6,
ruing6,
unrig6,
inion5,
inrun5,
inurn5,
union5,
4 letter words:
gorp7,
grip7,
ping7,
pong7,
prig7,
prog7,
pung7,
pion6,
pirn6,
porn6,
pour6,
puri6,
roup6,
upon6,
girn5,
giro5,
grin5,
ring5,
rung5,
inro4,
iron4,
noir4,
nori4,
noun4,
ruin4,
3 letter words:
gip6,
pig6,
pug6,
nip5,
pin5,
piu5,
poi5,
pro5,
pun5,
pur5,
rip5,
upo5,
urp5,
gin4,
gnu4,
gor4,
gun4,
nog4,
rig4,
rug4,
inn3,
ion3,
nor3,
nun3,
our3,
rin3,
run3,
urn3,
2 letter words:
op4,
pi4,
up4,
go3,
in2,
no2,
nu2,
oi2,
on2,
or2,
un2,