@rhelune Those are good ones, yes, thank you!

Exactly. As in many other languages too, also in German, when you know where the word comes from, you might realize that you already know more about it! Great. Yes. -tion is always die, -um (if from Latin) is das, das Museum, das Ministerium, and I just realized -tät is also always die! Like die Universität, die Kapazität, die Kausalität, die Produktivität.

Me looking at a newspaper: found another one! -schaft is always die. Die Gesellschaft, die Wissenschaft, die Genossenschaft, die Verwandtschaft, die Wirtschaft.

@Jenetrix