9 letter words:
provisors14,
8 letter words:
provisor13,
provisos13,
7 letter words:
proviso12,
porosis9,
6 letter words:
visors9,
pooris8,
priors8,
prosos8,
sopors8,
spoors8,
5 letter words:
spivs10,
rivos8,
visor8,
pisos7,
poori7,
prior7,
priss7,
proso7,
pross7,
risps7,
roops7,
soops7,
sopor7,
spoor7,
orris5,
4 letter words:
spiv9,
rivo7,
sovs7,
vors7,
oops6,
pirs6,
piso6,
piss6,
pois6,
poor6,
poos6,
poss6,
proo6,
pros6,
psis6,
rips6,
risp6,
roop6,
sips6,
soop6,
sops6,
isos4,
roos4,
sirs4,
sori4,
sris4,
3 letter words:
sov6,
vis6,
vor6,
oop5,
ops5,
pir5,
pis5,
poi5,
poo5,
pos5,
pro5,
psi5,
rip5,
sip5,
sop5,
ios3,
iso3,
oor3,
oos3,
ors3,
roo3,
sir3,
sis3,
sos3,
sri3,
2 letter words:
op4,
pi4,
po4,
io2,
is2,
oi2,
oo2,
or2,
os2,
si2,
so2,