jQuery: Find word and change every few seconds

How can I change a word every 2-3 seconds using jQuery?

For example:

I have this:

<div>
    <span>This is so</span>
    <span>awesome</span>
</div>

... and I want the awesome to change into cool,fantastic,incredible and keep cycling with loop using fadeOut/fadeIn effect maybe?

Is it possible?

Thanks alot