6 letter words:
foison9,
orison6,
5 letter words:
riffs11,
sniff11,
finos8,
firns8,
foins8,
frons8,
infos8,
roofs8,
irons5,
noirs5,
noris5,
ornis5,
rosin5,
4 letter words:
offs10,
riff10,
fino7,
fins7,
firn7,
firs7,
foin7,
fons7,
info7,
rifs7,
roof7,
inro4,
ions4,
iron4,
noir4,
nori4,
onos4,
rins4,
soon4,
sori4,
sorn4,
3 letter words:
iff9,
off9,
fin6,
fir6,
fon6,
for6,
fro6,
ifs6,
rif6,
ins3,
ion3,
noo3,
nor3,
nos3,
ono3,
ons3,
ors3,
rin3,
sin3,
sir3,
son3,
sri3,
2 letter words:
if5,
of5,
in2,
is2,
no2,
oi2,
on2,
or2,
os2,
si2,
so2,