Horror and thriller are interchangable. As I understand it, thriller generally refers to the pacing of the story, in the sense of soft-thrills, whereas horror refers to the mechanics of a story designed to elicit outright fear, but usually you'll find the genre of a story is attributed to the dominant element rather than being a 'horror thriller'.

You might call Alien a sci-fi horror thriller, for example.

Last edited by Charger: 21-May-10 at 02:06pm