8 letter words:
fissions11,
7 letter words:
fission10,
foisons10,
6 letter words:
foison9,
inions6,
ninons6,
onions6,
sissoo6,
5 letter words:
finis8,
finos8,
foins8,
infos8,
inion5,
ninon5,
nonis5,
noons5,
onion5,
4 letter words:
fini7,
fino7,
fins7,
foin7,
fons7,
foss7,
info7,
oofs7,
inns4,
ions4,
isos4,
nisi4,
noni4,
noon4,
onos4,
oons4,
sins4,
siss4,
sons4,
soon4,
soss4,
3 letter words:
fin6,
fon6,
ifs6,
oof6,
sif6,
inn3,
ins3,
ion3,
ios3,
iso3,
nis3,
non3,
noo3,
nos3,
ono3,
ons3,
oon3,
oos3,
sin3,
sis3,
son3,
sos3,
2 letter words:
if5,
of5,
in2,
io2,
is2,
no2,
oi2,
on2,
oo2,
os2,
si2,
so2,