The term "over-turns" refers to the act of flipping something over or causing it to fall or collapse. Some synonyms for this word include "upends," "capsizes," "tumbles," "topples," and "overthrows." These words all embody the same idea of something being knocked over or turned upside down. "Upend" specifically refers to something being vertically flipped, while "capsizes" usually refers to a boat or ship being overturned. "Tumbles" and "topples" both imply a more uncontrolled fall or collapse. "Overthrows" is often used in a more figurative sense, such as when a government is overthrown by a revolution or rebellion.