5 letter words:
fugio9,
guiro6,
4 letter words:
fork11,
kufi11,
grok9,
frig8,
frog8,
frug8,
four7,
giro5,
3 letter words:
kif10,
fig7,
fog7,
fug7,
irk7,
kir7,
koi7,
kor7,
fir6,
for6,
fou6,
fro6,
fur6,
rif6,
gor4,
rig4,
rug4,
our3,
2 letter words:
ki6,
if5,
of5,
go3,
oi2,
or2,