8 letter words:
cooption12,
6 letter words:
octopi10,
option8,
potion8,
5 letter words:
coopt9,
optic9,
picot9,
topic9,
conto7,
ontic7,
pinot7,
pinto7,
piton7,
point7,
tonic7,
topoi7,
4 letter words:
coop8,
poco8,
cion6,
coin6,
coni6,
coon6,
coot6,
icon6,
otic6,
pint6,
pion6,
poon6,
topi6,
topo6,
into4,
onto4,
toon4,
3 letter words:
cop7,
pic7,
con5,
coo5,
cot5,
nip5,
opt5,
pin5,
pit5,
poi5,
poo5,
pot5,
tic5,
tip5,
top5,
ion3,
nit3,
noo3,
not3,
ono3,
oot3,
tin3,
ton3,
too3,
2 letter words:
op4,
pi4,
in2,
it2,
no2,
oi2,
on2,
ti2,
to2,
