6 letter words:
fusion9,
5 letter words:
finos8,
firns8,
foins8,
fours8,
frons8,
infos8,
irons5,
noirs5,
noris5,
ornis5,
roins5,
rosin5,
ruins5,
urson5,
4 letter words:
fino7,
fins7,
firn7,
firs7,
foin7,
fons7,
four7,
fous7,
fris7,
fros7,
funs7,
furs7,
info7,
orfs7,
rifs7,
surf7,
ufos7,
inro4,
ions4,
iron4,
noir4,
nori4,
nous4,
nurs4,
onus4,
ourn4,
ours4,
rins4,
roin4,
ruin4,
runs4,
sori4,
sorn4,
sour4,
unis4,
urns4,
3 letter words:
fin6,
fir6,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
ifs6,
orf6,
rif6,
sif6,
ufo6,
ins3,
ion3,
ios3,
iso3,
nis3,
nor3,
nos3,
nur3,
nus3,
ons3,
ors3,
our3,
ous3,
rin3,
run3,
sin3,
sir3,
son3,
sou3,
sri3,
sui3,
sun3,
sur3,
uni3,
uns3,
urn3,
2 letter words:
if5,
of5,
in2,
io2,
is2,
no2,
nu2,
oi2,
on2,
or2,
os2,
ou2,
si2,
so2,
un2,
ur2,
us2,