| Answer | Crossword Clue |
|---|---|
| degeneration | The state or process of being or becoming degenerate; decline or deterioration |
| extinction | The state or process of a species, family, or larger group being or becoming extinct |
| extinctions | The state or process of a species, family, or larger group being or becoming extinct |
| obsolescence | the state, process, or condition of being or becoming obsolete. |
| convolution | The state of being coiled or twisted, or the process of becoming so |
| convolutions | The state of being coiled or twisted, or the process of becoming so |
