Letter on position 1 (m) changed: 8 words busses cusses fusses husses pusses susses tusses wusses Letter on position 2 (u) changed: 4 words masses messes misses mosses Letter on position 3 (s) changed: 1 word mulses Letter on position 4 (s) changed: 1 word mushes Letter on position 6 (s) changed: 2 words mussed mussel