5 letter words:
pious7,
poise7,
4 letter words:
epos6,
opes6,
opus6,
oups6,
peso6,
pies6,
pise6,
piso6,
pois6,
pose6,
sipe6,
soup6,
spie6,
spue6,
supe6,
euoi4,
3 letter words:
ope5,
ops5,
oup5,
pes5,
pie5,
pis5,
piu5,
poi5,
pos5,
psi5,
pus5,
sip5,
sop5,
sup5,
upo5,
ups5,
ios3,
iso3,
oes3,
ose3,
ous3,
sei3,
sou3,
sue3,
sui3,
use3,
2 letter words:
op4,
pe4,
pi4,
po4,
up4,
es2,
io2,
is2,
oe2,
oi2,
os2,
ou2,
si2,
so2,
us2,