What makes a thriller/horror?

Thriller
Thriller is a genre of literature, film, and television that uses suspense, tension, and excitement as the main elements. Thriller Films usual have a plot which involves a build up of tension throughout the film top keep the audience on edge of there seats this is done through mystery and the producers of the film keeping some information vital to the outcome from the audience. The thriller films often have a crime genre involved with detectives and police men in them.

Horror

Horror films are unsettling movies that strive to elicit the emotions of fear, disgust and horror from viewers. Horrors usually involve murders and mutation of the body most horror films have this content, the main characters involved in the films almost always have a flaw or have something wrong with there face which separates them from the audience, this make the audience not feel sorry or relate to the bad guy. weapons in horrors are often knives or bats, as the are more graphic  than some one.