Elasticities refer to the degree of responsiveness of a variable to changes in another variable. There are different types of elasticities used in various fields, and each type has its own synonyms. For instance, the price elasticity of demand can also be called measure of consumer responsiveness, demand sensitivity, or price sensitivity. Cross-price elasticity is often referred to as substitution elasticity, while income elasticity is also known as consumer income responsiveness. Additionally, elasticity of supply could be called producer sensitivity or supply responsiveness. Moreover, the mean elasticities are sometimes referred to as average responsiveness or average sensitivity. Understanding these synonyms allows one to express concepts across different fields in various ways, making it easier to communicate effectively in different contexts.