[Forum Game] Change A Letter

[zenophobia]

Since you guys are enjoying the other one so much, why don't I give you a bit more of an intellectual one?  :D

Make a completely new word by changing ONE letter in the previous word.

For Example

timed can become debit by changing the m to a b

You can muddle up the letters as much as you wish provided you only CHANGE ONE letter please also remember forum rules and keep it clean and friendly.

Slang is fine too if you can't think of any proper words.  :P

So basically: change ONE letter in this word to make a new word.

We'll start with the word...

yeast

P.S. you can edit your post if you get ninja'd, to be fair