Letter on position 1 (r) changed: 9 words boos coos doos goos loos moos poos woos zoos Letter on position 2 (o) changed: 2 words reos rhos Letter on position 3 (o) changed: 8 words robs rocs rods roes roks roms rots rows Letter on position 4 (s) changed: 7 words rood roof rook room roon roop root