Horror films often deal with the viewer's nightmares, hidden fears, revulsions and terror of the unknown. Plots within the horror genre often involve the intrusion of an evil force, event, or personage, commonly of supernatural origin, into the everyday world. Prevalent elements include ghosts, aliens, vampires, werewolves, demons, gore, torture, vicious animals, evil witches, monsters, zombies, cannibals, and serial killers. Conversely, movies about the supernatural are not necessarily always horrific.

But admit there is always a movies which made you scared and pissed no matter how much you don't believe in it.

however horror movies usually attract viewers more than supernatural ones, I mean basically

It's one of my favorite.

Yes, even if you don't believe in the movies, there will always be ones that make you angry and terrified.

Dead Silence and Evil Dead Rise are amazing Horror movies i have ever seen