7 letter words:
appoint11,
6 letter words:
option8,
potion8,
5 letter words:
inapt7,
paint7,
panto7,
patin7,
patio7,
piano7,
pinot7,
pinta7,
pinto7,
piton7,
point7,
topoi7,
4 letter words:
poop8,
atop6,
nipa6,
pain6,
pant6,
pian6,
pina6,
pint6,
pion6,
pita6,
poon6,
topi6,
topo6,
anti4,
into4,
iota4,
naoi4,
nota4,
onto4,
tain4,
toon4,
3 letter words:
app7,
pap7,
pip7,
pop7,
apo5,
apt5,
nap5,
nip5,
opt5,
pan5,
pat5,
pia5,
pin5,
pit5,
poi5,
poo5,
pot5,
tap5,
tip5,
top5,
ain3,
ait3,
ani3,
ant3,
ion3,
nit3,
noo3,
not3,
oat3,
ono3,
oot3,
tan3,
tao3,
tin3,
ton3,
too3,
2 letter words:
op4,
pa4,
pi4,
ai2,
an2,
at2,
in2,
it2,
na2,
no2,
oi2,
on2,
ta2,
ti2,
to2,