Letter on position 1 (r) changed: 6 words aims dims hims nims sims vims Letter on position 2 (i) changed: 4 words rams rems roms rums Letter on position 3 (m) changed: 8 words rias ribs rids rifs rigs rins rips rits Letter on position 4 (s) changed: 4 words rima rime rimu rimy