So the theme might be closer to "supernatural"? "Monster" can also refer, in a hyperbolic way, to people - doing terrible, inhumane things. Would that be an acceptable take on the prompt, or are we limited to the strict supernatural meaning of the word?

(Secondary question - if our work focused on the idea of "monsters" not through objective criteria, but through the way it's perceived, would it be okay? Here I'm thinking about something like first contact between the species, if the general tone of the story focused on the grotesque/threatening aspects of the other.)