Not at all. There is lots of interesting discussion on the difference between suspense and thriller: https://www.google.com/search?q=diff...e+and+thriller
It mainly boils down to the fact that thrillers are action-oriented and suspense or mystery movies are not. One particular article breaks it down thus: Suspense/Mystery is "why" and "who". Thriller is "how". Doesn't mean there can't be elements of each in one movie, like Alien is horror/sci-fi, but to me a suspense film and a thriller are different. But maybe that's just me...