6 letter words:
skiffs16,
stiffs12,
5 letter words:
skiff15,
stiff11,
tiffs11,
kists9,
skits9,
tikis9,
fists8,
sifts8,
4 letter words:
kifs11,
tiff10,
kiss8,
kist8,
kits8,
skis8,
skit8,
tiki8,
tsks8,
fist7,
fits7,
sift7,
sits4,
3 letter words:
kif10,
iff9,
kis7,
kit7,
ski7,
tsk7,
fit6,
ifs6,
its3,
sis3,
sit3,
tis3,
2 letter words:
ki6,
if5,
is2,
it2,
si2,
ti2,