They are made-up words, possibly created as examples for a language learning exercise or as part of a fictional universe.
To determine if one is a superordinate of the other, we'd need more information:
* What do these words mean?
* What context are they used in?
Without that information, it's impossible to say if "schtek" is a superordinate (broader category) of "floozle" (more specific category).
Let me know if you can provide more context about these words, and I can help you figure out their relationship!