The word "knee-shaped" refers to something that is shaped like a human knee. However, there are several synonyms that can be used to describe something that has a similar shape. Some of these synonyms include "bent", "angled", "curved", "crooked", "jointed", and "angular". Each of these words can be used to describe objects or body parts that have bends or joints in them. Furthermore, these synonyms can be used to add vivid imagery to writing or speech and can be helpful in describing a variety of different objects or situations. With the help of these synonyms, writers can create more detailed descriptions that will capture their audience's attention.