9 letter words:
niffering16,
8 letter words:
infringe12,
refining12,
7 letter words:
griffin14,
reffing14,
riffing14,
finnier10,
ginnier8,
reining8,
6 letter words:
fifing13,
griffe13,
iffier12,
niffer12,
finger10,
fining10,
firing10,
fringe10,
ginner7,
5 letter words:
griff12,
fifer11,
feign9,
grief9,
finer8,
infer8,
genii6,
iring6,
reign6,
renig6,
inner5,
renin5,
4 letter words:
fief10,
fife10,
riff10,
frig8,
fern7,
fine7,
fire7,
firn7,
neif7,
reif7,
rife7,
gien5,
girn5,
grin5,
ring5,
nine4,
rein4,
3 letter words:
eff9,
iff9,
fig7,
fen6,
fer6,
fie6,
fin6,
fir6,
ref6,
rif6,
eng4,
erg4,
gen4,
gie4,
gin4,
neg4,
reg4,
rig4,
ern3,
inn3,
ire3,
rei3,
rin3,
2 letter words:
ef5,
fe5,
if5,
en2,
er2,
in2,
ne2,
re2,