5 letter words:
apoop9,
appro9,
poori7,
4 letter words:
oppo8,
parp8,
pipa8,
poop8,
prop8,
ripp8,
pair6,
poor6,
prao6,
proa6,
proo6,
roop6,
3 letter words:
app7,
pap7,
pip7,
pop7,
apo5,
oop5,
par5,
pia5,
pir5,
poa5,
poi5,
poo5,
pro5,
rap5,
rip5,
air3,
oar3,
oor3,
ora3,
rai3,
ria3,
roo3,
2 letter words:
op4,
pa4,
pi4,
po4,
ai2,
ar2,
io2,
oi2,
oo2,
or2,