7 letter words:
nonpoor9,
6 letter words:
ronion6,
5 letter words:
orpin7,
pinon7,
poori7,
porno7,
prion7,
proin7,
onion5,
ronin5,
4 letter words:
noop6,
pion6,
pirn6,
poon6,
poor6,
porn6,
proo6,
roop6,
inro4,
iron4,
noir4,
noni4,
noon4,
nori4,
roin4,
roon4,
3 letter words:
nip5,
oop5,
pin5,
pir5,
poi5,
poo5,
pro5,
rip5,
inn3,
ion3,
non3,
noo3,
nor3,
ono3,
oon3,
oor3,
rin3,
roo3,
2 letter words:
op4,
pi4,
po4,
in2,
io2,
no2,
oi2,
on2,
oo2,
or2,