6 letter words:
sprout8,
stroup8,
stupor8,
5 letter words:
ports7,
pours7,
pouts7,
prost7,
roups7,
sport7,
spout7,
spurt7,
stoup7,
strop7,
turps7,
roust5,
routs5,
stour5,
sutor5,
torus5,
tours5,
4 letter words:
opts6,
opus6,
oups6,
port6,
post6,
pots6,
pour6,
pout6,
pros6,
purs6,
puts6,
roup6,
soup6,
spot6,
spur6,
stop6,
tops6,
trop6,
tups6,
urps6,
orts4,
ours4,
oust4,
outs4,
rost4,
rots4,
rout4,
rust4,
ruts4,
sort4,
sour4,
sout4,
tors4,
tour4,
3 letter words:
ops5,
opt5,
oup5,
pos5,
pot5,
pro5,
pst5,
pur5,
pus5,
put5,
sop5,
sup5,
top5,
tup5,
upo5,
ups5,
urp5,
ors3,
ort3,
our3,
ous3,
out3,
rot3,
rut3,
sot3,
sou3,
sur3,
tor3,
uts3,
2 letter words:
op4,
po4,
up4,
or2,
os2,
ou2,
so2,
st2,
to2,
ur2,
us2,
ut2,