7 letter words:
tiffins13,
6 letter words:
tiffin12,
5 letter words:
niffs11,
sniff11,
stiff11,
tiffs11,
finis8,
snift8,
intis5,
4 letter words:
fifi10,
niff10,
tiff10,
fini7,
fins7,
fist7,
fits7,
sift7,
inti4,
isit4,
nisi4,
nits4,
snit4,
tins4,
3 letter words:
iff9,
fin6,
fit6,
ifs6,
sif6,
ins3,
its3,
nis3,
nit3,
sin3,
sit3,
tin3,
tis3,
2 letter words:
if5,
in2,
is2,
it2,
si2,
st2,
ti2,