Tone
Bone
Bane
Bake
Make
Fake
Take
Cake
Care
Rare
Rape
Rake
Race
Lace
Mace
Mate
Maze
Haze
Gaze
Gave
Game
Lame
Lake
Like
Bike
Bite
Kite
Site
Side

notice noone changet the 4th letter yet?

TIDE