5 letter words:
coifs10,
coofs10,
roofs8,
coirs7,
orris5,
4 letter words:
coif9,
coof9,
corf9,
fico9,
fisc9,
foci9,
firs7,
rifs7,
roof7,
coir6,
coos6,
cors6,
cris6,
orcs6,
rocs6,
sori4,
3 letter words:
fir6,
for6,
fro6,
ifs6,
rif6,
cis5,
coo5,
cor5,
cos5,
orc5,
roc5,
sic5,
ors3,
sir3,
sri3,
2 letter words:
if5,
of5,
is2,
oi2,
or2,
os2,
si2,
so2,