Now, while haptic feedback is a vibration, it is quite separate and distinct from notification vibrations. (The lack of a tag wiki certainly doesn't help.) I don't think they should be synonyms. In fact, "vibration" should probably be notification-vibration or similar.
Does anyone have a good argument for why these should stay synonyms? (Yes, I know it'll take touching every single question with vibration to fix. I'm willing to do it.)