Weird 404 Page Not Found Issue

So I am having an oddball issue that I wanted to see if anyone had any insight on. I create a page and called it Catalog. The permalink is innermindsourcing.com/catalog. I publish it and I get a 404-Not Found. If I change the page name to Class Catalog and the permalink to innermindsourcing.com/class-catalog it shows up fine. The site did this for about 5 or the 17 pages. It wouldn't publish with the original name, add another word and it would. Thoughts? I would really like to get back to shorter names to save "real estate" on the Tabs. Thanks