5 letter words:
spook11,
kotos9,
stook9,
stoop7,
topos7,
4 letter words:
kops10,
koto8,
sook8,
took8,
oops6,
opts6,
poos6,
post6,
pots6,
spot6,
stop6,
topo6,
tops6,
oots4,
soot4,
3 letter words:
kop9,
kos7,
tsk7,
ops5,
opt5,
poo5,
pot5,
pst5,
sop5,
top5,
oot3,
sot3,
too3,
2 letter words:
op4,
os2,
so2,
to2,