First off, NEVER use Godaddy for hosting unless you have more time on your hands than a tired slug! There are plenty of hosting options on the table at the moment that are much better than Godaddy will ever be.
That said, there are two ways to achieve what you are seeking.
Use of Sub Domains
Essentially, you would be setting up the domains much like About.com has their website set up:
waterbottles.yourdomain.com
cheesecakes.yourdomain.com
loseweight.yourdomain.com
breastimplants.yourdomain.com
Use Of Folders
In this method, you are using the same technique as say a company that sells a lot of WP Templates and they offer live views. What you do is go into your hosting account and create a folder and place the new install inside of that folder. Here is a prime example below.
The TLD templateaccess.com in of itself displays no content.
But if you go to?
http://www.templateaccess.com/wpdemos/wp188/
You will find a sample WP theme fully displayed. Notice that they used two folders in this particular sequence. You can set yours up however you see fit. Yours might look like this.
Yourdomain.com/waterbottles/
Yourdomain.com/cheesecakes/
Yourdomain.com/loseweight/
Yourdomain.com/breastimplants/