9 letter words:
prefigure15,
8 letter words:
refigure12,
7 letter words:
prefire12,
figurer11,
6 letter words:
prefer11,
figure10,
refuge10,
griper9,
pugree9,
purger9,
refire9,
5 letter words:
grief9,
firer8,
freer8,
frere8,
frier8,
gripe8,
purge8,
refer8,
repeg8,
rifer8,
prier7,
puree7,
purer7,
riper7,
rupee7,
rerig6,
urger6,
4 letter words:
pfui9,
frig8,
frug8,
fere7,
fire7,
free7,
grip7,
prig7,
reef7,
reif7,
rife7,
peer6,
pere6,
peri6,
pier6,
pree6,
pure6,
puri6,
purr6,
ripe6,
eger5,
gree5,
grue5,
urge5,
ruer4,
3 letter words:
fig7,
fug7,
fee6,
fer6,
feu6,
fie6,
fir6,
fur6,
gip6,
peg6,
pig6,
pug6,
ref6,
rif6,
pee5,
per5,
pie5,
piu5,
pur5,
rep5,
rip5,
urp5,
erg4,
gee4,
gie4,
reg4,
rig4,
rug4,
ere3,
err3,
ire3,
ree3,
rei3,
rue3,
2 letter words:
ef5,
fe5,
if5,
pe4,
pi4,
up4,
er2,
re2,