Replace with Text with Links?

Im looking for a simple plugin that will allow me to input a word and then a hyperlink. It will then turn any occurrence of that text into a url in any page or post. I had this for a cms i was using and they called it “autolinks”. It was great. Im not looking for anything fancy or hackish, just hoping something simple like this exits.

Would like to be able to maintain a list of these words/urls of course.