9 letter words:
thriftily18,
7 letter words:
lithify16,
thrifty16,
trilith10,
6 letter words:
filthy15,
flirty12,
thirty12,
thrift12,
5 letter words:
filth11,
firth11,
fitly11,
frith11,
yirth11,
flirt8,
fritt8,
thirl8,
tilth8,
4 letter words:
flir7,
flit7,
frit7,
hili7,
hilt7,
lift7,
rift7,
thir7,
liri4,
tilt4,
tirl4,
titi4,
3 letter words:
fly9,
fry9,
thy9,
fil6,
fir6,
fit6,
hit6,
rif6,
try6,
lit3,
til3,
tit3,
2 letter words:
hi5,
if5,
it2,
li2,
ti2,