5 letter words:
fifer11,
ruffe11,
firer8,
frier8,
rifer8,
wirer8,
wrier8,
4 letter words:
fief10,
fife10,
riff10,
ruff10,
wife10,
fire7,
reif7,
rife7,
weir7,
wire7,
ruer4,
3 letter words:
eff9,
few9,
iff9,
fer6,
feu6,
fie6,
fir6,
fur6,
ref6,
rif6,
err3,
ire3,
rei3,
rue3,
2 letter words:
ef5,
fe5,
if5,
we5,
er2,
re2,