7 letter words:
fennier10,
funnier10,
neurine7,
6 letter words:
ferine9,
funner9,
refine9,
unfree9,
5 letter words:
finer8,
infer8,
ennui5,
enure5,
inner5,
inrun5,
inure5,
inurn5,
renin5,
urine5,
4 letter words:
enuf7,
fere7,
fern7,
fine7,
fire7,
firn7,
free7,
neif7,
reef7,
reif7,
rife7,
erne4,
nene4,
nine4,
rein4,
ruin4,
rune4,
3 letter words:
fee6,
fen6,
fer6,
feu6,
fie6,
fin6,
fir6,
fun6,
fur6,
ref6,
rif6,
ere3,
ern3,
inn3,
ire3,
nee3,
nun3,
ree3,
rei3,
rin3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
if5,
en2,
er2,
in2,
ne2,
nu2,
re2,
un2,