Change one letter

[Prophetic Darkness]

Carried over from chain letters everywhere, it's change a letter!
All you do is change one letter of the last word given to make a new one. However, you can only change one letter, and you aren't allowed to add or subtract any.

Example: Ball
Bell
Sell
Fell
Feel
Feed
Heed
So on and so on.

The word is

Soon  

[Prophetic Darkness]

((Did you know that's one r away from moron?))
Mood  

[Prophetic Darkness]

((You posted moon twice))

Loon  

[Prophetic Darkness]

Pour