5 letter words:
griff12,
gruff12,
4 letter words:
miff12,
muff12,
guff11,
riff10,
ruff10,
firm9,
frig8,
frug8,
grim7,
grum7,
muir6,
rimu6,
3 letter words:
iff9,
fum8,
fig7,
fug7,
gif7,
fir6,
fur6,
gum6,
mig6,
mug6,
rif6,
mir5,
rim5,
rum5,
gur4,
rig4,
rug4,
2 letter words:
if5,
mi4,
mu4,
um4,
gi3,
gu3,
ug3,
ur2,