7 letter words:
nonpoor9,
6 letter words:
ronion6,
5 letter words:
orpin7,
pinon7,
poori7,
porno7,
prion7,
onion5,
4 letter words:
pion6,
pirn6,
poon6,
poor6,
porn6,
inro4,
iron4,
noir4,
noon4,
nori4,
3 letter words:
nip5,
pin5,
poi5,
poo5,
pro5,
rip5,
inn3,
ion3,
noo3,
nor3,
ono3,
rin3,
2 letter words:
op4,
pi4,
in2,
no2,
oi2,
on2,
or2,