Letter on position 1 (t) changed: 13 words bens cens dens fens gens hens kens lens pens rens sens wens yens Letter on position 2 (e) changed: 4 words tans tins tons tuns Letter on position 3 (n) changed: 10 words teas tecs teds tees tefs tegs tels tems tets tews Letter on position 4 (s) changed: 3 words tend tene tent