8 letter words:
febrific18,
6 letter words:
biffer14,
iffier12,
5 letter words:
fifer11,
brief10,
fiber10,
fibre10,
firie8,
icier7,
4 letter words:
biff12,
fief10,
fife10,
fifi10,
riff10,
fice9,
frib9,
bice8,
crib8,
fier7,
fire7,
reif7,
rife7,
bier6,
brei6,
brie6,
cire6,
eric6,
icer6,
rice6,
3 letter words:
eff9,
iff9,
fib8,
erf6,
fer6,
fie6,
fir6,
ref6,
rif6,
ice5,
reb5,
rec5,
rib5,
ire3,
rei3,
2 letter words:
ef5,
fe5,
if5,
be4,
bi4,
er2,
re2,