The term 'ABLE TO CHANGE SHAPE' can be summarized by the word 'PROTEAN', which is a seven-letter word. PROTEAN is an adjective that describes something or someone that is able to change shape or form easily. It is derived from the Greek god Proteus, who was known for his ability to change his form at will. This term is often used to describe people who are adaptable and flexible in their approach to life.