Ascending and descending are pairs of antonyms. While descending means to move from a higher position to a lower one, ascending means to move from a lower position to a higher one. The two words are often used together when describing movements or changes in elevation, such as when climbing stairs or hiking up a mountain. Other antonyms for descending could include rising, climbing, or moving upward. On the other hand, antonyms for ascending could include falling, dropping, or moving downward. These words can be useful in writing, especially when trying to convey a sense of movement or direction.