It's possible, sure. But WordPress is a blogging platform, not a "forum". You could integrate bbPress (which is a forum) into WordPress without too much trouble.
WordPress is more of a platform than a finished web-architect program. You can do anything you like with it. But to do those sorts of things, you need to know coding and web design fairly well. That sort of integration is not for the beginner.
I'd say that if you want to make something that is just like Drupal, use Drupal. The right tool for the right job. WordPress is more for the customizer. Think of it like a hot-rod. The hatchback will get you there too, the hot-rod takes a lot more work to make it look really nice, but once you've got it everybody is envious. ;)