6 letter words:
griffe13,
5 letter words:
griff12,
fifer11,
preif10,
prief10,
grief9,
gripe8,
4 letter words:
fief10,
fife10,
riff10,
frig8,
fier7,
fire7,
grip7,
prig7,
reif7,
rife7,
peri6,
pier6,
ripe6,
3 letter words:
eff9,
iff9,
feg7,
fig7,
gif7,
erf6,
fer6,
fie6,
fir6,
gip6,
peg6,
pig6,
ref6,
rif6,
per5,
pie5,
pir5,
pre5,
rep5,
rip5,
erg4,
gie4,
reg4,
rig4,
ire3,
rei3,
2 letter words:
ef5,
fe5,
if5,
pe4,
pi4,
gi3,
er2,
re2,