The civil rights movement marked a period of social 'upheaval' in the U.S.
The island was created by an 'upheaval' of the ocean floor.
a period of cultural and social 'upheavals'
(..) Maddening. What's going on? What do you want? Sheldon informed me that you're experiencing an emotional upheaval, and I'm here to help. That's so nice. And we're back to the obvious. Now, what's up? Well, uh... okay. (..)2011 TvShow: The Big Bang Theory Title: The Skank Reflex Analysis Season: 5 Episode 1