Letter on position 1 (f) changed: 13 words cons dons eons gons hons ions kons mons oons pons sons tons wons Letter on position 2 (o) changed: 4 words fans fens fins funs Letter on position 3 (n) changed: 8 words fobs foes fogs fohs fops foss fous foys Letter on position 4 (s) changed: 3 words fond fone font