Clinging is a term that describes an action or behavior of holding on to something tightly. CONTINUING, STRONG, ADHESIVE, and RETENTIVE are all words that can be used to describe clinging. CONTINUING means to persist in a course of action, STRONG implies having great power or intensity, ADHESIVE refers to the ability to stick to something, and RETENTIVE means having the capacity to retain something. All of these words together can be used to describe the act of clinging.