6 letter words:
unfree9,
5 letter words:
enure5,
4 letter words:
enuf7,
fere7,
fern7,
free7,
reef7,
erne4,
rune4,
3 letter words:
fee6,
fen6,
fer6,
feu6,
fun6,
fur6,
ref6,
ere3,
ern3,
nee3,
ree3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
en2,
er2,
ne2,
nu2,
re2,
un2,