Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to treat pain, inflammation, and fever. However, there are various other synonymous terms used for naproxen, such as Aleve, Anaprox, Naprosyn, and Naprelan. These drugs are available in both prescription and over-the-counter options and are often used for various medical conditions such as arthritis, menstrual cramps, and migraine headaches. It's always wise to consult with a physician before taking any medication and to be aware of possible side effects that can occur with any medicine, including naproxen.