6 letter words:
pistil8,
5 letter words:
pilis7,
pills7,
slipt7,
spill7,
spilt7,
split7,
tipis7,
lilts5,
still5,
tills5,
4 letter words:
lips6,
lisp6,
pili6,
pill6,
pits6,
slip6,
spit6,
tipi6,
tips6,
ills4,
lilt4,
list4,
lits4,
sill4,
silt4,
slit4,
till4,
tils4,
3 letter words:
lip5,
pis5,
pit5,
psi5,
pst5,
sip5,
tip5,
ill3,
its3,
lis3,
lit3,
sit3,
til3,
tis3,
2 letter words:
pi4,
is2,
it2,
li2,
si2,
ti2,