5 letter words:
fungo9,
4 letter words:
frog8,
frug8,
fugu8,
four7,
guru5,
rung5,
3 letter words:
fog7,
fug7,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
gnu4,
gor4,
gun4,
nog4,
rug4,
nor3,
our3,
run3,
urn3,
2 letter words:
of5,
go3,
no2,
nu2,
on2,
or2,
un2,