Because there must be one. You know, something which generates two or more words for a generic title and you just go and make the film based on that. I have two pieces of evidence for this:
1. Imagine the scene, film people sitting around talking about making a movie that has action, adventure, some kind of enemy/creatures to fight, and a location this takes place in. They fire up the machine using the generic title of _____ on a _____. The machine comes up with (a) snakes and (b) plane and history is made.
2. And then there's
This!