How can I change “page” (as in foobar.com/page/5) to another word?

I would like the URLs for “pages” on my blog (which is to say the collections of titles and excerpts fpr 10 entries) to be called something else, such as “groups”, so that the URL for the page for the 10 most recent entries would be www.[foobar].com/group/1, and so on. How can this be achieved?