Hey davec47,
You can add the original Scrabble app back to the home page by following the steps in this article: Organize the Home Screen and App Library on your iPhone. To do so, locate the app in the App Library, and then touch and hold the app icon. You should see a list of options, one being "Add to Home Screen" Once you tap that you should see it on your Home Screen.
As far as Scrabble Go, what issue are you experiencing with it? If you search for it in the App Store, do you have the option of opening the app or is the only option to "Get" or redownload?
This informaiton may help you get more answers.
Take care.