6 letter words:
funner9,
gunner7,
4 letter words:
frug8,
enuf7,
fern7,
genu5,
grue5,
rung5,
urge5,
rune4,
3 letter words:
jug11,
jeu10,
jun10,
fug7,
fen6,
fer6,
feu6,
fun6,
fur6,
ref6,
eng4,
erg4,
gen4,
gnu4,
gun4,
neg4,
reg4,
rug4,
ern3,
nun3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
en2,
er2,
ne2,
nu2,
re2,
un2,