Plasticization refers to the process of making a material more pliable and easy to shape by adding plasticizers. There are several synonyms that can be used to describe this process, such as flexibility, adaptation, malleability, and formability. These words all convey the idea of changing the properties of a material to make it more suitable for a particular use or application. Additionally, terms like modification and alteration can also be used to describe the plasticization process, emphasizing the change that occurs in the material as a result of the addition of plasticizers. Overall, there are many ways to describe the process of plasticization using a variety of related terms and phrases.