8 letter words:
frugging14,
7 letter words:
fugging13,
gurging10,
rugging10,
6 letter words:
urging8,
5 letter words:
fungi9,
ruing6,
unrig6,
4 letter words:
frig8,
frug8,
firn7,
grig6,
girn5,
grin5,
ring5,
rung5,
ruin4,
3 letter words:
fig7,
fug7,
fin6,
fir6,
fun6,
fur6,
rif6,
gig5,
igg5,
gin4,
gnu4,
gun4,
rig4,
rug4,
rin3,
run3,
urn3,
2 letter words:
if5,
in2,
nu2,
un2,