Compile vs. Build

I use Dev-C++ 4, and I noticed a button called Rebuild All, and it seems to do the exact same thing as Compile. Is this a redundant button, or does it have some hidden use I'm not aware of? I've searched the boards, and looked at the Dev C++ help file, but I got nothing.

Sometimes Dev-C++ doesn't compile the code properly if I am quickly compiling and making changes to source code while fixing bugs. When that happens, choose rebuild and it compiles properly. That's how I look at it practically, anyway.