Hi Morgan,
you can do this with a bit of jQuery (Javascript).
Have a look here:
http://jsfiddle.net/e27Dt/
Or even more simple, here:
http://jsfiddle.net/e27Dt/1/
You will need to give the word a class or an id and then trigger it with jQuery.
The image you can place in the gridder and give it a display: none.
And when you activate the hover function, it switches to display: block.
Let me know if that works for you!
Marius
Marius