6 letter words:
finito9,
forint9,
intron6,
5 letter words:
front8,
inion5,
intro5,
niton5,
nitro5,
torii5,
4 letter words:
fino7,
firn7,
foin7,
font7,
fort7,
frit7,
info7,
rift7,
inro4,
inti4,
into4,
iron4,
noir4,
nori4,
riot4,
roti4,
tiro4,
tori4,
torn4,
trio4,
3 letter words:
fin6,
fir6,
fit6,
fon6,
for6,
fro6,
oft6,
rif6,
inn3,
ion3,
nit3,
nor3,
not3,
ort3,
rin3,
rot3,
tin3,
ton3,
tor3,
2 letter words:
if5,
of5,
in2,
it2,
no2,
oi2,
on2,
or2,
ti2,
to2,