7 letter words:
riffler13,
6 letter words:
riffle12,
rifler9,
5 letter words:
fifer11,
filer8,
firer8,
flier8,
frier8,
lifer8,
rifer8,
rifle8,
4 letter words:
fief10,
fife10,
riff10,
file7,
fire7,
flir7,
lief7,
life7,
reif7,
rife7,
lier4,
lire4,
riel4,
rile4,
3 letter words:
eff9,
iff9,
elf6,
fer6,
fie6,
fil6,
fir6,
ref6,
rif6,
err3,
ire3,
lei3,
lie3,
rei3,
2 letter words:
ef5,
fe5,
if5,
el2,
er2,
li2,
re2,