Yes. AFAIK "satellites" is just a term for anything other than center/sub. Those 4-5 speakers that just float around you creating the 5-7.1 audio image.
Any speaker can technically play any roll, but you like to make things look nice and choose speakers best suited for their job. Generally your main front speakers are your nicest full range speakers (often the most expensive, standing speakers), your rear channels can be smaller bookshelf ones - which are cheaper, smaller and have less range - and your center is generally a dedicated center.