5 letter words:
pious7,
pisos7,
soups7,
4 letter words:
opus6,
oups6,
piso6,
piss6,
pois6,
poss6,
psis6,
puss6,
sips6,
sops6,
soup6,
sups6,
isos4,
siss4,
soss4,
sous4,
suss4,
3 letter words:
ops5,
oup5,
pis5,
piu5,
poi5,
pos5,
psi5,
pus5,
sip5,
sop5,
sup5,
upo5,
ups5,
ios3,
iso3,
ous3,
sis3,
sos3,
sou3,
sui3,
sus3,
2 letter words:
op4,
pi4,
po4,
up4,
io2,
is2,
oi2,
os2,
ou2,
si2,
so2,
us2,