6 letter words:
foists9,
posits8,
ptosis8,
5 letter words:
skips11,
spiks11,
kists9,
skits9,
fists8,
foist8,
sifts8,
softs8,
pisos7,
posit7,
posts7,
spits7,
spots7,
stops7,
topis7,
4 letter words:
kifs11,
kips10,
kops10,
skip10,
spik10,
fops9,
kiss8,
kist8,
kits8,
kois8,
koss8,
skis8,
skit8,
tsks8,
fist7,
fits7,
foss7,
sift7,
soft7,
opts6,
piso6,
piss6,
pits6,
pois6,
post6,
pots6,
psis6,
psst6,
sips6,
sops6,
spit6,
spot6,
stop6,
tips6,
topi6,
tops6,
sits4,
sots4,
toss4,
3 letter words:
kif10,
kip9,
kop9,
fop8,
kis7,
kit7,
koi7,
kos7,
ski7,
tsk7,
fit6,
ifs6,
oft6,
ops5,
opt5,
pis5,
pit5,
poi5,
pot5,
psi5,
pst5,
sip5,
sop5,
tip5,
top5,
its3,
sis3,
sit3,
sos3,
sot3,
tis3,
2 letter words:
ki6,
if5,
of5,
op4,
pi4,
is2,
it2,
oi2,
os2,
si2,
so2,
ti2,
to2,