Letter on position 1 (m) changed: 13 words bells cells dells fells hells jells kells pells sells tells vells wells yells Letter on position 2 (e) changed: 4 words malls mills molls mulls Letter on position 3 (l) changed: 3 words meals merls mewls Letter on position 4 (l) changed: 3 words melas melds melts