7 letter words:
feigner11,
freeing11,
gunfire11,
reefing11,
6 letter words:
feeing10,
feuing10,
figure10,
finger10,
fringe10,
refuge10,
ferine9,
refine9,
unfree9,
5 letter words:
feign9,
fugue9,
fungi9,
grief9,
finer8,
infer8,
genie6,
genre6,
green6,
reign6,
renig6,
ruing6,
unrig6,
enure5,
inure5,
urine5,
4 letter words:
frig8,
frug8,
fugu8,
enuf7,
fere7,
fern7,
fine7,
fire7,
firn7,
free7,
neif7,
reef7,
reif7,
rife7,
eger5,
gene5,
genu5,
gien5,
girn5,
gree5,
grin5,
grue5,
guru5,
ring5,
rung5,
urge5,
erne4,
rein4,
ruin4,
rune4,
3 letter words:
fig7,
fug7,
fee6,
fen6,
fer6,
feu6,
fie6,
fin6,
fir6,
fun6,
fur6,
ref6,
rif6,
eng4,
erg4,
gee4,
gen4,
gie4,
gin4,
gnu4,
gun4,
neg4,
reg4,
rig4,
rug4,
ere3,
ern3,
ire3,
nee3,
ree3,
rei3,
rin3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
if5,
en2,
er2,
in2,
ne2,
nu2,
re2,
un2,