How can I improve my file/class name recall?

The User class, that's easy to remember. It's tied to a concrete thing. But for most files and classes, trying to remember the name is like trying to remember a word in a foreign language I haven't studied since high school. I have to stop and think about it, and if I rush it I might just come up with the wrong word entirely. It makes it harder to communicate, look up the files I need, and even think about what I need to code. Have you experienced the same thing? Any suggestions?