5 letter words:
pubis9,
pious7,
pisos7,
soups7,
4 letter words:
bops8,
pubs8,
bios6,
boos6,
boss6,
buss6,
obis6,
oops6,
opus6,
piso6,
piss6,
pois6,
poos6,
psis6,
puss6,
sibs6,
sips6,
sobs6,
sops6,
soup6,
subs6,
sups6,
sous4,
3 letter words:
bop7,
pub7,
bio5,
bis5,
boo5,
bos5,
bus5,
obi5,
ops5,
pis5,
piu5,
poi5,
poo5,
psi5,
pus5,
sib5,
sip5,
sob5,
sop5,
sub5,
sup5,
upo5,
ups5,
sis3,
sos3,
sou3,
2 letter words:
bi4,
bo4,
op4,
pi4,
up4,
is2,
oi2,
os2,
si2,
so2,
us2,