Think of it the other way, words to links. Copy the URL you want to link to, then highlight the words, click the link button, then dump the link in. Voila, done.
How does the image button work stupidly? It's the same as the rest: Press button, put in link, all is well. The link button only work bad because no one seems to understand that codes need a closing tag.
I also recommend looking at the stickies/push pinned threads. Because they tend to answer stuff like this. Like the "Read this before making a new thread" one. Because you obviously didn't read it before making a new thread...
"Put whatever you want to call the link here"//redcloth.org/textile/phrase-modifiers/#links
I hope that helps you with your formatting skills and how to make a link just words. Enclosed in the link is actually a resourceful site on how to format properly. Hope it helps.