| dinosaur extinction | 0.66 | Muller had the dinosaur extinction in mind when he proposed the current research. | ||
| face extinction | 0.39 | Cut down the number of sports and competitors or else the Games face extinction. | ||
| playoff extinction | 0.39 | The loss pushed the Nuggets to the brink of playoff extinction. | ||
| species extinction | 0.39 | He found that the rate of species extinction was about the same in all of the areas. |