8 letter words:
proofing14,
7 letter words:
fourgon11,
roofing11,
ingroup10,
pouring10,
rouping10,
6 letter words:
pooing9,
poring9,
progun9,
roping9,
unroof9,
urping9,
inpour8,
5 letter words:
proof10,
forgo9,
fugio9,
fungi9,
fungo9,
gonif9,
gonof9,
gipon8,
group8,
oping8,
pingo8,
pirog8,
prong8,
orpin7,
poori7,
porno7,
prion7,
purin7,
unrip7,
giron6,
groin6,
guiro6,
ruing6,
unrig6,
4 letter words:
pfui9,
poof9,
pouf9,
prof9,
frig8,
frog8,
frug8,
goof8,
fino7,
firn7,
foin7,
four7,
goop7,
gorp7,
grip7,
info7,
ping7,
pong7,
prig7,
prog7,
pung7,
roof7,
pion6,
pirn6,
poon6,
poor6,
porn6,
pour6,
puri6,
roup6,
upon6,
girn5,
giro5,
goon5,
grin5,
ring5,
rung5,
inro4,
iron4,
noir4,
nori4,
ruin4,
3 letter words:
fop8,
fig7,
fog7,
fug7,
fin6,
fir6,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
gip6,
pig6,
pug6,
rif6,
nip5,
pin5,
piu5,
poi5,
poo5,
pro5,
pun5,
pur5,
rip5,
upo5,
urp5,
gin4,
gnu4,
goo4,
gor4,
gun4,
nog4,
rig4,
rug4,
ion3,
noo3,
nor3,
ono3,
our3,
rin3,
run3,
urn3,
2 letter words:
if5,
of5,
op4,
pi4,
up4,
go3,
in2,
no2,
nu2,
oi2,
on2,
or2,
un2,