5 letter words:
idiot6,
iodin6,
nitid6,
tondi6,
4 letter words:
dino5,
dint5,
doit5,
nidi5,
nodi5,
inti4,
into4,
3 letter words:
din4,
dit4,
don4,
dot4,
nod4,
tod4,
ion3,
nit3,
not3,
tin3,
ton3,
2 letter words:
do3,
id3,
od3,
in2,
it2,
no2,
oi2,
on2,
ti2,
to2,