I never knew the creature as the “xenomorph”, despite having seen Aliens–the movie where the term xenomorph was first used–before seeing Alien. My friends and I were far more informed by the titles of the film franchise than by the scientific designation tossed out by everyone’s least favorite space marine, Lieutenant Gorman. We knew that the scariest creature to ever crawl across a movie screen needed no fancy descriptor. It simply was the Alien. The Alien.
To date I’ve had more nightmares about the Alien than anything else, with tornadoes taking the silver and Bloody Mary a distant third. I’ve had nightmares about the first two well into my adulthood, and in fact had my most recent dream of an Alien swarm just a few months ago. I don’t remember much of the dream, just that the Alien infestation was so massive and devastating that the entire west coast was being evacuated, and it was roughly 100x’s more intense and frightening than any zombie apocalypse could be.