7 letter words:
tipsify15,
5 letter words:
fisty11,
tipsy10,
tipis7,
4 letter words:
pity9,
spif9,
yips9,
fist7,
fits7,
sift7,
pits6,
spit6,
tipi6,
tips6,
isit4,
3 letter words:
spy8,
yip8,
fit6,
ifs6,
sif6,
sty6,
pis5,
pit5,
psi5,
pst5,
sip5,
tip5,
its3,
sit3,
tis3,
2 letter words:
fy8,
if5,
pi4,
is2,
it2,
si2,
st2,
ti2,