7 letter words:
firking15,
6 letter words:
fiking14,
firkin13,
girkin11,
irking11,
firing10,
5 letter words:
iring6,
4 letter words:
fink11,
firk11,
gink9,
king9,
frig8,
kirn8,
rink8,
fini7,
firn7,
girn5,
grin5,
ring5,
3 letter words:
kif10,
fig7,
gif7,
ink7,
irk7,
kin7,
kir7,
fin6,
fir6,
rif6,
gin4,
rig4,
rin3,
2 letter words:
ki6,
if5,
gi3,
in2,