6 letter words:
frisks13,
5 letter words:
forks12,
frisk12,
risks9,
4 letter words:
fork11,
kifs11,
irks8,
kirs8,
kiss8,
kois8,
kors8,
koss8,
kris8,
risk8,
skis8,
firs7,
foss7,
rifs7,
sirs4,
sori4,
sris4,
3 letter words:
kif10,
irk7,
kir7,
kis7,
koi7,
kor7,
kos7,
ski7,
fir6,
for6,
fro6,
ifs6,
rif6,
ors3,
sir3,
sis3,
sos3,
sri3,
2 letter words:
ki6,
if5,
of5,
is2,
oi2,
or2,
os2,
si2,
so2,