And probably more.
Remember, both are written in Java and the only limitations are those where there aren't API hooks. Forge has different hooks than Bukkit, but the overlap is pretty close to Forge having everything Bukkit does, and probably some extras. Because Forge is open source developed, anyone who needs a new hook can write a pull request to get that hook added to Forge. Doesn't necessarily mean it will be approved, but in my experience Bukkit is rather static with the opinion of if Bukkit can't already do it, then it isn't needed.