Just an idea - but maybe you could combine multiple things into one quiz too. e.g. "bodies of water on the world map", with seas, rivers and lakes.
It used to be eastsea in old english aswell.
Thanks for the great quiz KoljiVriVoda! Once again, I've learnt something new. You see, I knew about Bering Strait, but have NEVER ever heard about Bering Sea.
This quiz is Earth-centric.