Elastin is an important protein found in the connective tissues of the body, responsible for the elasticity and resilience of skin, blood vessels, lungs, and other organs. Although there are no exact synonyms for elastin, there are some related terms that can be used to describe its function and properties, including elasticity, resilience, flexibility, pliability, and suppleness. These words all suggest the ability to stretch and rebound without losing shape or integrity, which are key features of elastin. While elastin is a specific protein with a defined role in the body, these synonyms can be useful in discussing similar qualities in other materials or systems.