What is it called when you use three words to create suspense? For example, what suddenly seemed to be a different kind of silence, onimous, dreadful.
I'm not sure whether it's called anything, especially the specification of three words. Really it's only two adjectives following a noun. You could add more:
It was a different kind of silence - ominous, dreadful, beyond anything I'd experienced, and altogether frightening.
Are you sure it has a special name?