Definately. There are so many things in that movie that are just downright WRONG and creepy

James Mason, sinister as hell, forever going on about "Mr Barlow" and how "He'll enjoy you"

The floating kid at the window, the "box" in the back of the truck going ice cold... and that DAMNED HOUSE. Spookiest house ever shown in a movie imo!
I don't find movies scary, never have, but I definately get creeped out and feel uncomfortable watching some, I agree with The Shining, the music adRAB to a lot of the eeriness, it's a fantastically chilling score.
The Exorcist is awesome for it's time, still works it's magic even today.
One movie that always left me feeling really uncomfortable as a kid and still does to a lesser degree now is
Magic with Anthony Hopkins. That doll is evil, just the look of the damned thing creeps me out. And Hopkins' descent into madness is more terrifying than any Monster movie.