Change 1 letter to make a new word #2

Cyst

 Moonlight:

Cyct

Cycl

bicycle

 Helo_Mek_in_Vegas:

Iriko

that's so far away. This is Change 1 letter to make a new word #2  not Word Association #4 

 Moonlight:

Oyst

 Moonlight:

Cyct

 Moonlight:

Hycli

None of these are real words. You can check in an online dictionary to confirm.

 TogoAlfa:

Cyst

Cost

Croast

 ColourMePurple:

Sorry again but this is not a valid word.

Toast

Yes it is look it up : Croast 

to roast something over a small open flame.