6 letter words:
frisks13,
5 letter words:
firks12,
fisks12,
frisk12,
risks9,
4 letter words:
firk11,
fisk11,
kifs11,
irks8,
kirs8,
kiss8,
kris8,
risk8,
skis8,
firs7,
fris7,
rifs7,
sirs4,
sris4,
3 letter words:
kif10,
irk7,
kir7,
kis7,
sik7,
ski7,
fir6,
ifs6,
rif6,
sif6,
sir3,
sis3,
sri3,
2 letter words:
ki6,
if5,
is2,
si2,