Letter on position 1 (f) changed: 14 words bads cads dads gads hads lads mads nads pads rads sads tads wads yads Letter on position 2 (a) changed: 3 words feds fids fuds Letter on position 3 (d) changed: 9 words faas fabs fags fahs fans fars fats faws fays Letter on position 4 (s) changed: 3 words fade fado fady